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Let X denote the number of times heads o...

Let X denote the number of times heads occur in `n` tosses of a fair coin. If `P(X=4),\ P(X=5)\ a n d\ P(X=6)` are in AP; the value of `n` is

A

7,14

B

10,14

C

12,7

D

14,12

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A
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