Suppose X is a discrete random variable that takes on the values 0, 1, 2 and Y is a discrete random variable that takes on the values 0, 1, 2, and 3. EE fxY(1, y) = O Elfxy (z, 1) + fxr(z, 2) + fxy(z, 3)] z O Elfxy (0, y) + fxy (1, y) + fxr(2,y)] Z O Elfxr(z,0) + fxr(z, 1) + fxr(z, 2) + fxy(z,3)] O Elfxr (0, y) + fxr (1, y) + fxx(2,y) + fxr(3, y)]