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If for a binomial distribution the mean ...

If for a binomial distribution the mean is 6 and the standdard deviation is `sqrt2`, then P(X=r)=

A

`""^(9) C_(r) ((2)/(3))^(r) ((1)/(3))^(9-r)`

B

`""^(9) C_(r) ((1)/(3))^(r) ((2)/(3))^(9-r)`

C

`""^(12) C_(r) ((2)/(3))^(r) ((1)/(3))^(12-r)`

D

`""^(12) C_(r) ((1)/(3))^(r) ((2)/(3))^(9-r)`

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A
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AAKASH SERIES-RANDOM VARIABLE -PRACTICE EXERCISE
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  2. If the mean and variance of a binomial variate X are (4)/(3),(8)/(9) ...

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  3. If for a binomial distribution the mean is 6 and the standdard deviati...

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  4. A box contains 4 red and 8 white balls . If 4 balls are drawn one by o...

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  5. Probability of happening of an event in an experiment is 0.4 . The pro...

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  6. In a binomial distribution the mean is 12 and the standard deviation i...

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  7. A fair coin is tossed a fixed number times . If the probability of get...

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  8. A coin is biased so that the probability of falling head when tossed i...

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  9. If 10 coins are tossed then mean and variance of x and x denotes the n...

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  10. A die is thrown twice. If getting a number greater than four on the di...

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  11. Three dice are rolled 4 times . The probability of getting sum 17 exac...

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  12. Two cards are drawn successively with replacement . The mean of number...

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  13. The standard deviation of a poisson distribution is 4 then its mean is

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  14. If a random variable X has a Poisson distribution such that P(X=1)=P(X...

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  15. In a Poisson distribution P(X=0) =2P(X=1) then the standard deviation ...

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  16. In a Poission X, If P(X=0)=0.2 then the variance of the distribution i...

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  17. In a factory manufacturing certain spare parts 2% of the output is fou...

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  18. The incidence of an occupation disease to the workers of a factory is ...

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  19. If 2% of a given lot of manufactured parts are defective , then the pr...

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  20. Statement I : A fair coin is tossed 100 times . The probability of g...

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