Question: 4. For any random variables X1, X2 and any numbers c1, C2, show that Var(c1X1 + C2X2) = ciVar(X1) + 2cic2Cov(X1, X2) + c, Var(X2)

4. For any random variables X1, X2 and any numbers c1,

4. For any random variables X1, X2 and any numbers c1, C2, show that Var(c1X1 + C2X2) = ciVar(X1) + 2cic2Cov(X1, X2) + c, Var(X2)

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