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If X is a binomial variate with paramete...

If X is a binomial variate with parameters n and p, where `0gt pgt` such that `(P(X=r))/(P(X=n-r))` is independent of n and r, then p equals.

A

`(1)/(3)`

B

`(1)/(2)`

C

`(1)/(4)`

D

none of these

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The correct Answer is:
B
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