Easy2Siksha.com
   2024
/  
  
 : 3   :100
:     ,            
           
-
1. ()     .



()       :


X
3
4
5
6
7
8
9
Y
2
3
5
6
3
2
4
Z
5
6
4
5
6
3
8
2.         :

2001
2003
2004
2005
2006

2
13
35
85
210
-
3. ()         
(b)                 
 ?
4. (a)          
Easy2Siksha.com
()        
-
5.         
6. ()       
(b)  X       P(X = 2) = 9, P(X = 4) = 90  P(X = 1)  X  
   
-
7. ()        
()       
8.      
Easy2Siksha.com
   2024
/  
  
 : 3   :100
:     ,            
           
-
1. ()     .



()       :


X
3
4
5
6
7
8
9
Y
2
3
5
6
3
2
4
Z
5
6
4
5
6
3
8
:󹶆󹶚󹶈󹶉   ( )
                :
 ():  ()
   :

   :

            
Easy2Siksha.com
 ():  
       :
   :
1.   

2.   

󹺢       ( )
󷄧󷄫  ()
           :    
2󰊯  ()

              
󷷑󷷒󷷓󷷔:

 1   2   
 3    
󷄧󷄭  ()

                  
󷷑󷷒󷷓󷷔:

 1 
 2  3      
󽆐󽆑󽆒󽆓󽆔󽆕 (): 
Easy2Siksha.com
  :

  :

󼩏󼩐󼩑   
        1      
  ,   1     2  3    

           
     ,             
  
󷷑󷷒󷷓󷷔:
  1, 2  3    ,
  2  1  3      
󷄧󼿒  

  
󼪔󼪕󼪖󼪗󼪘󼪙 ():  
  
X
3
4
5
6
7
8
9
Y
2
3
5
6
3
2
4
Z
5
6
4
5
6
3
8
  :
 1 =
Easy2Siksha.com
 2 =
 3 =
󷄧󹻘󹻙󹻚󹻛 1:      
       (    ):









󷄧󹻘󹻙󹻚󹻛 2:     

:




󰇛

󰇜󰇛

󰇜
   :

󰇛󰇜󰇛󰇜
󰇛

󰇜󰇛
󰇜


󰇛
󰇜󰇛
󰇜




󷄧󼿒:


󷷑󷷒󷷓󷷔  :
       ,
           
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󷄧󹻘󹻙󹻚󹻛 3:     

:








:

󰇛
󰇜
󰇛󰇜
󰇛󰇜󰇛󰇜󰇛
󰇜
󰇛󰇜





󷄧󼿒:


󷷑󷷒󷷓󷷔  :
         
2.         :

2001
2003
2004
2005
2006

2
13
35
85
210
:󷋇󷋈󷋉󷋊󷋋󷋌  
             :

2001
2002
2003
2004
2005
2006

2
5
13
35
85
210
Easy2Siksha.com
  ,                  2 
210 !     ,     
     :                  
      
󹵈󹵉󹵊    ?
         :

 :
  () ,
  () ,
  
 -,               
   ""  :
                ,      
 
󼪔󼪕󼪖󼪗󼪘󼪙-- 
 1:     
        ,     (2001, 2002, )   
  ,   :
for 2001 for 2002 for 2006
       :
x ( )
1
2
3
4
5
6
y ()
2
5
13
35
85
210
 2:  
      ,        

Easy2Siksha.com
         :

 :
,
,
.
 3:    
   (     10   ):
x
y
 y
1
2
0.301
2
5
0.699
3
13
1.114
4
35
1.544
5
85
1.929
6
210
2.322
 4:    
           (     )
   
   :





    :




    :
1. 
2. 
 5:    
Easy2Siksha.com
 (1) :

 (2)    :



 :



   :
󰇛󰇜

 6:     
  :








     :
󰇛󰇜
󷈷󷈸󷈹󷈺󷈻󷈼
   :
   ( )  0.89 (1  )
 ,   2.24    
󷷑󷷒󷷓󷷔 : 2001  ():
󰇛󰇜
    !
2006  ():
Easy2Siksha.com
󰇛󰇜

 !
󷘹󷘴󷘵󷘶󷘷󷘸 
,            "  "    
 "   "    ,         :
󰇛󰇜
                  
              
󽆪󽆫󽆬 
              ,     
 ,                  
          ,         (2001  2
  )             (2006  210   )    
-
3. ()         
(b)                 
 ?
:
                    
  ,                 
  ,                   
  ,          -      
                  
      ,            , 
                 ,     
    
 ():    
Easy2Siksha.com
  
       :

A

B

 

,

A

B





 

 


 

:
󰇛󰇜󰇛󰇜󰇛󰇜
    :
󷷑󷷒󷷓󷷔            =      ×   
  ,            
   ()
                    
          
,           
          
   
             
    :
󰇛󰇜
󰇛󰇜
󰇛󰇜
(provided 󰇛󰇜)
     :󰇛󰇜
󰇛󰇜󰇛󰇜󰇛󰇜
:
󰇛󰇜󰇛󰇜󰇛󰇜
Easy2Siksha.com
  
 :  
   A  B  ,  A     B      
,
󰇛󰇜󰇛󰇜
,
󰇛󰇜󰇛󰇜󰇛󰇜
        
 ():        
  
    52    
   = 4
          
       = 4
-- 
      ,          
 1:       
52     4  
󰇛1st ace󰇜

Easy2Siksha.com
 2:
      
        :
  = 51
 = 3
󰇛2nd ace 1st ace󰇜

 3:       
:
  = 50
 = 2
󰇛3rd ace first two aces󰇜

 4:       
:
  = 49
 = 1
󰇛4th ace first three aces󰇜

 5:    
󰇛all four aces󰇜




   :




Easy2Siksha.com

 
󰇛all four cards are aces󰇜


                     
        ,       -    
     ,                  
    ,      --        
       ,       ,  
                     
              
4. (a)          
()        
:(a)          
      ,            
         ,            
         ,         :
1.   
2.   
           ,   -    
:
   (PMF)
   ()
   -         
Easy2Siksha.com
   (PMF)
                 , 
    -     
 
                  

         
   :  (H) (T)
      
          :
X =   
:
P(X = 0) = ½
P(X = 1) = ½
 ,          PMF   
   
        
          
     1   
    0  1   
 ,      :
        X           ?”
   ()
                ,   
            
Easy2Siksha.com
 
                    


          
      (, 160.2 , 160.25 , )
          
    :
       160      ?
  ,         
             ,            ,
 :
P(160  <   < 165 )
                      
   
       
        
            
    1 
 ,       :
        X        ?”
      



  


   


    
-

  
   
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 
 , 
 , , 
()   
        :         ,   
            
  ?
 ,                  

  :
           ,    ,  
       
             
  
        :
1.   (    )
2.   (   )
1.   (   )
           
   
     
      
                    
2.   (   )
Easy2Siksha.com
             
                  
  
(i)   
    
          
(ii)
  
   
        
(iii)   
    
      :
o     
o      
o 
(iv)   
    
        
    ?
    :
      
       
    
    
      
   ,     
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   
             :
  
     
               
              ?

 ,                
              , 
          ,    ,     
                     
    ,                 
         
-
5.         
:      :             
                
:   ,   ,  ,      
             
  ,         ,      
                    
 
1.    ?
 ,                 
  ,  :
1.             (  )
2.           
3.      
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 
   n =   
   p =    
   q = 1 − p =    
n      x         ?
󰇛󰇜󰇡
󰇢

     ,             
2.     ()
                        
 
-- :
       ,      
       p  
  n   ,           
 
       p   ,
Mean 
:
     10           0.5 , :
Mean 
,   5     
3.     ()
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              
   :
 =󰇛󰇜
n    ,      ,
Variance 
     :
 p = 0 1 ,   0       
      p = 0.5  ,      
4.     
  ,   
Standard Deviation

        ,         
5.    (MGF)   
   ()             
       
   , MGF    :
󰇛󰇜󰇛
󰇜
    :
      = np
          = npq
                   ,
          ,      
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6.    
           
 p = q = 0.5 ,    
 p < 0.5 ,         ( 
 )
 p > 0.5 ,          ( 
 )
  ,      :
Skewness

7.    
      
   ,   :


 n   ,          
                
  
8.    
       
Mode 󰇛󰇜
         
   
                    
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9.   (   )
            :
󰇛󰇜
󰇛󰇜
󰇛󰇜
󰇛󰇜
    -       ,         

10. 
                    
                   
 ,         (np),  (npq),   ,  , 
       
              ,  
                       , 
                      
6. ()       
(b)  X       P(X = 2) = 9, P(X = 4) = 90  P(X = 1)  X  
   
: ()      
            ""       
            -    
 -    
   
 
o :.
󰇛
󰇜
o :           (   ,
         )
 
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o :.
󰇛
󰇜
o :    , ,      (,   
   )    
  
󰇛󰇜
o  : .
o :
󰇛󰇜
󰇛󰇜

󰇛󰇜


   ?󰇛󰇜󰇛󰇜
󰇛󰇜󰇛󰇜
󰇛󰇜
󰇛󰇜( -  )
o  : ( ), (  )
o :
󰇛󰇜
󰇛󰇜



  :     󰇛󰇜
   

o  : .󰇟󰇠

o : .󰇛󰇜

󰇛
󰇜
󰇛
󰇜
o  :  ; -  ,   (),  ,      

󰇛
󰇜

o  : (   )󰇟󰇠
o : ( )󰇛󰇜

o  :      - ;             
     
    
   /           
      "  "       
              -   
 -      "  "        
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 :       ;             
          ,     -
     
󰇛
󰇜󰇛
󰇜
 ()        :   
         ,         :
󰇛󰇜


   
󰇟󰇠 󰇛󰇜
    :
󰇛󰇜,
󰇛󰇜󰇛󰇜.
                    
 1:         

               :

    :
󰇛󰇜
󰇛󰇜




  :󰇛󰇜󰇛󰇜
󰇛󰇜
󰇛󰇜








        ,  
󰇟󰇠 󰇛󰇜 
 2:       
Easy2Siksha.com
          ,     1    
  , ,   1         ,    , 
  󰇛󰇜󰇛󰇜

     ,       (, )       
,                    
    ,           ;     
      ,          (,    
 ?)󰇛󰇜󰇛󰇜󰇛󰇜󰇛󰇜󰇛󰇜
 3:          
,      ,    󰇛󰇜󰇛󰇜

,
󰇟󰇠 󰇛󰇜 
   (      )       ,   
                  
󰇛󰇜
-
7. ()        
()       
:
 ,                
        ,           
,               
                  
  
                    ,
                   
  ,                  
        
Easy2Siksha.com
(a)    
   
                       
      ,          
                 
( )  ,              
                   
󷷑󷷒󷷓󷷔    =   
󷷑󷷒󷷓󷷔    =    
   ?
   ,           :
              
         
          
    ,                
          
 
                    :
   6      = 70
  = 65
                   
          ,           

Easy2Siksha.com
     ,         
     ,            
   :
   = 2      
   = 15        
  ,                 
     
1.      
2.          
3.      
4. , ,           
5.          

       
    (     )   
        
     ,          
()       
      ,            
        

                  

      
Easy2Siksha.com
     
           
           ,        , 
    

      ,       
  

    200     
    1,000       
   50     
            ,    
    
        ,      
   
   :
       
         
      




    
  
 
 



 

   
    


   
 
   
    
Easy2Siksha.com
 
     
1,000     
      ?
1.   
2.    
3.   
4.   
5.          
         ,           
     
     
         ,         
         ,     

                    
               
             ,   
             
  ,            
                
 ,            ,    
            
8.      
:󷋇󷋈󷋉󷋊󷋋󷋌   
                     
 ,        ,   ?  -  
  ,     ,       
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    

        ( )         
   
:           (   ,   
 ,     )
:        (, 50 , 100  )
󷷑󷷒󷷓󷷔   :      ,       
  ,              
 ?
    
               
     
󹵍󹵉󹵎󹵏󹵐  
                    

1.  
                    
:      500   ,         50  
 ,       
: ,    
:     -         
2.  
 ,      k-   
      1,000         10
      ,   100  
:                
      ,      
3.  
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  ,           (     ) 
             
         ,           
   60   ,      20    
:      
:          
4.  
     ,    ()   
              
      ,       ()   
          
:             
             
5.  
                ,   
:                 
:    
:   ,        
6.  
 ,              
    40%   60%        
             
      
:                
7.  () 
              
        ,      
          
:     
           ,     
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,                " "   
        :
:      
:  k- 
 :     ,  
:   
:        
:      
:    
󽆪󽆫󽆬 
          ,      
                   
     ,     ,         
     
             
       ,      