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If the mean of a binomial distribution w...

If the mean of a binomial distribution with 9 trials is 6, then its variance is

A

2

B

3

C

4

D

`sqrt2`

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The correct Answer is:
A
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AAKASH SERIES-RANDOM VARIABLE -EXERCISE - I
  1. In a binomial distribution n=20, q=0.75. Then mean =

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  2. In a binomial distribution the mean is 20, standard deviation is sqrt1...

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  3. If the mean of a binomial distribution with 9 trials is 6, then its va...

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  4. For binomial distribution n=10, q=0.4, then mean is

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  5. Six coins are tossed simultaneously . The probability of getting at le...

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  6. If a binomial distribution have parameters 9, 1//3 then P(X=4)=

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  7. If the mean and variance of a binomial distribution are 15//4 and 15//...

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  8. Let X be a binomially distributed variate with mean 10 and variance 5....

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  9. The mean and standard deviation of a binomial variate X are 4 and sqrt...

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  10. The mean and the variance of a binomial distribution are 4 and 2 respe...

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  11. X is a binomial variate with parameters n=6 and p. If 4P(X=4)=P(X=2), ...

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  12. The probability that a student is not swimmer is 1//4. Then the probab...

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  13. From a pack of 52 cards, 3 cards are drawn successively with replaceme...

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  14. A pair of dice is rolled 4 times. The probability of getting doublet e...

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  15. Out of 10,000 families with 4 children each , the probability number o...

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  16. If X is a Poisson variate such that P(X=0)=P(X=1), then the parameter ...

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  17. In a Poisson distribution if P(X=0)=P(X=1)=k, the value of k is

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  18. If X is a poisson distribution such that P(X=1)=P(X=2)then,P(X=4)=

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  19. If X is a Poisson variate and P(X=1)=2P(X=2) them P(X=3)=

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  20. A random variable X has poisson distribution with mean 2. Then P(xlt1....

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