Let X and Y be discrete random variables. Let Px,y denote the joint pmf of X and Y. Prove that EY = E(Y|X = x]P(X = x).
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Let X and Y be discrete random variables. Let Px,y denote the joint pmf of X and Y. Prove that EY = E(Y|X = x]P(X = x).
Let X and Y be discrete random variables. Let Px,y denote the joint pmf of X and Y. Prove that EY = E(Y|X = x]P(X = x).
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