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Let X ~ B (n,p) , if E (X ) = 5...

Let `X ~ B (n,p) `, if
`E (X ) = 5 , "Var" (X ) =2.5 ` then `p (X lt 1)=`

A

`((1)/(2))^(11)`

B

`((1)/(2))^(10)`

C

`((1)/(2))^(6)`

D

`((1)/(2))^(9)`

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Let X ~ B (n, p ), if E (X) = 5, Var (X) = 2.5, then P(X<1) is

    A
    `(1/2)^11`
    B
    `(1/2)^10`
    C
    `(1/2)^6`
    D
    `(1/2)^9`

  • For X ~ B (n,p), n = 10, E (X) = 5, then Var (X) =

    A
    2.5
    B
    25
    C
    0.5
    D
    50

  • For X ~ B (n,p),if E(X) = 5, Var (X) = 2.5, then p =

    A
    0.1
    B
    0.2
    C
    0.5
    D
    0.6

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