Question: Let X and Y be discrete random variables with joint pdf f(x, y) = 4/(5xy) if x = 1, 2 and y = 2, 3,

Let X and Y be discrete random variables with joint pdf f(x, y) = 4/(5xy) if x = 1, 2 and y = 2, 3, and zero otherwise. Find:

(a) E(X).

(b) E(Y).

(c) E(XY).

(d) Cov(X, Y).

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