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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) \ and \ 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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