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1. Let X be a random variable with the following probability distribution. 3 4 X 1 2 0.2 0.1 P(X=X) 0.4 0.3 a. Find E(X) and Var(X). 2. Let X be a random variable with the following probability distribution. X 5 10 15 20 25 P(X=x) 0.05 0.3 0.25 0.25 0. 15 a. Find the expected value and variance