Find the expected value and the variance of x

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Reference no: EM131177896

Let X be the random variable whose value is n if the first success occurs on the nth trial when independent Bernoulli trials are performed, each with probability of success p.

a) Find a closed formula for the probability generating function GX.

b) Find the expected value and the variance of X using Exercise 57 and the closed form for the probability generating function found in part (a).

Reference no: EM131177896

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