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Please do not copy answers from other websites. Those answers are not right. Let X be the difference between the number of Heads and the

Please do not copy answers from other websites. Those answers are not right.

Let X be the difference between the number of Heads and the number of Tails in n tosses of a fair coin.

(a).Compute the probability mass function of X

(b).Compute E[X] and Var(X)

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