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).
Posted: Mon Nov 15, 2021 10:44 am
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).