Question: 7. Suppose thatX is a discrete random variable withE(X) = 1 andE 4 X(X2) 5 = 3. Find Var(3X + 5).

7. Suppose thatX is a discrete random variable withE(X) = 1 andE 4 X(X−2) 5 = 3. Find Var(−3X + 5).

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