Question: 1. Suppose p(r, y, z), the joint probability mass function of the random variables X, Y, and Z, is given by p(1, 1, 1) =

1. Suppose p(r, y, z), the joint probability mass function of the random variables X, Y, and Z, is given by p(1, 1, 1) = 2, p(2, 1, 1) = 7, p(1, 1, 2) = 2, p(2, 1, 2) = 16 p(1, 2, 1) = 1 16' P(2, 2, 1) = 0, p(1, 2, 2) = 0, p(2, 2, 2) = 7- What is E[X Y = 2]? What is E[X |Y = 2, Z = 1]

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