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Please help me Problem 3. In class, we proved that for a random variable X and any constant a, Var(a + X) = a +

Please help me

Problem 3. In class, we proved that for a random variable X and any constant a, Var(a + X) = a + Var(X). Now prove that for any constant b, we have Var(bX) = b'Var(X)

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