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A bag consists of 10 balls each marked w...

A bag consists of 10 balls each marked with one of the digits 0 to 9.If four balls are drawn successively with replacement from the bag,what is the probability that none is marked with the digit 0?

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  12. Given that X~B(n,p) (i)If n=10 and p=0.4,find E(X) and Var(X).

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  13. Given X~B(n,p)(ii)If P=0.6,E(X)=6,find n and Var(X).

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  14. Given X~B(n,p)(iv)If n=25,E(X)=10,find P and SD(X).

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  15. Given that X~B(n,p) (iv)If n=10,E(X)=8,find Var(X).

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  16. Let X~B(10,0.2).Find (i)(X=1)

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  18. Let X~B(10,0.2).Find (iii)P(Xle8)

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  19. LetX~B(n,p)(i)If n=10,E(X)=5,find p and Var(X).

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  20. LetX~B(n,p)(ii)If E(X)=5 and Var(X)=2.5,find n and p.

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