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Given X~B(n,p).IfE(X)=6,and Var (X) = 4...

Given X~B(n,p).IfE(X)=6,and Var (X) = 4.2, find the valye of n.

A

40

B

10

C

20

D

15

Text Solution

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The correct Answer is:
C
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  3. Given X~B(n,p).IfE(X)=6,and Var (X) = 4.2, find the valye of n.

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  4. Given X~B(n,p) if E(X) = 6, Var (X) = 4.2 , find the value of n and p...

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  7. A r.v. X~B (n, p). If values of mean and variance of X are 18 and 12 r...

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  11. Given that X ~ B( n=10, p) .If E (x) = 8, find the value of p .

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

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  14. For X ~ B (n = 10, p = 0.2), P (X=1) =

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  15. For X ~ B (n = 10, p = 0.2), P(X ge 1) =

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  16. For X ~ B (n = 10, p = 0.2), P (X le 8) =

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  17. For X ~ B (n = 8, p = 0.5), P (|X-2| le 2) =

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