Question: 12 Let the joint probability density function of X and Y be given by f(x, y) = ye-(+) if x>0, y >0 to otherwise. (a)

12 Let the joint probability density function of X and Y be given by f(x, y) = ye-(+) if x>0, y >0 to otherwise.

(a) Show that E(X) does not exist.

(b) Find E(XY).

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