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A machine produces coins such that the probability of heads, p, follows a Beta distribution with...

A machine produces coins such that the probability of heads, p, follows a Beta distribution with parameters (α, β) = (1, 1). A coin produced by this machine is picked at random and tossed independently n times. Let Y be the number of heads.

(a) Find E[Y].

(b) Write down the pmf for Y (your answer can include unevaluated integrals and combination numbers [aka “n choose m” symbols]).

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