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A coin is tossed four times,then the exp...

A coin is tossed four times,then the expected value of the number of heads is………

A

1

B

2

C

3

D

4

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CHETANA PUBLICATION-BINOMIAL DISTRIBUTION-EXERCISE
  1. A coin is tossed six times.The probability of obtaining 5 or 6 heads i...

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  2. For a binomial distribution,n=5.If P(X=4)=P(X=3) then p=…….

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  3. A coin is tossed four times,then the expected value of the number of h...

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  4. If p.m.f of a r.v.X is P(X)=P(A)=(4/x)(5/9)^x.(4/9)^(4-x),x=0,1,2,3,4 ...

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  5. A fair coin is tossed 9 times.The probability that it shows exactly 5 ...

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  6. The probability of guessing correctly at least six of 10 answers in Tr...

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  7. X is a binomial variate with E(X)=4 and standard deviation =sqrt 3,the...

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  8. If a fair die is rolled 5 times,what is the probability that two of th...

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  9. X~B(n,P) if n=6 and P[x=4]=P[x=2] then P=

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  10. A fair coin tossed 8 times.The probability that it shows heads a large...

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  11. If mean of a binomial distribution is 3 and variance is 3/2 the proba...

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  12. If X~B(n,P) and E(X)=12,Var(X)=4,then n=?

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  13. A die is thrown three times.The probability of obtaining at most two s...

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  14. In a binomial distribution,n=4.If 2P(X=3)=3P(X=2)then p=……….

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  15. Given that X~B(n=10,P) and E(X)=8,find the value of P.

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  16. The probability that the certain kind of component will survive a chec...

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  17. Let the p.m.f or r.v.x be P(X)=(4/x)(5/x)^x(4/9)^(4-x),x=0,1,2,3,4.Fin...

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  18. Let X~B(n,P) (i) If n=10,E(X)=5,find P and Var(X)

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

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  20. A fair coin is tossed 6 times.Find the probability that it shows a lar...

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