Question: Question 4 Let a, b (O, 1). Let X and Y be discrete random variables with the joint distribution given by IP(X = x,

Question 4 Let a, b (O, 1). Let X and Y be discrete random variables with the joint distribution given by IP(X = x, Y (1 - - b)ka, k e NIJ o, (a) Compute the probability mass function of X. 63 marks] (b) Compute the probability mass function of Y. (c) Compute E(Y). You may use that marks] 63 marks]

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