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In flipping a fair coin let X be the number of tosses to get the first head. Then f(x) = (.5)^x for x = 1,
In flipping a fair coin let X be the number of tosses to get the first head. Then f(x) = (.5)^x for x = 1, 2, 3, . . .. Find MX(t) and use it to get E(X) and V(X) = Var(X).
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