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1. (4 points) We draw two numbers at random with replacement from the set {1,2,3,4,5}.
Denote the first number, X, and the second number, Y. (a) Calculate the expectation of the
product, E(XY) (b) Repeat part (a) if instead the two numbers are drawn at random without
replacement from the set {1,2,3,4,5}.

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