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If X is a Poisson variate such that P(X=...

If X is a Poisson variate such that `P(X=2)=9P(X=4)`, then the mean and variance of X are

A

(1, 2)

B

(1, 1)

C

(2, 1)

D

(2, 2)

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The correct Answer is:
B
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