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Random Variableshard
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If XXX and YYY are independent random variables such that Var(X)=4Var(X) = 4Var(X)=4 and Var(Y)=9Var(Y) = 9Var(Y)=9, determine the variance of the random variable Z=5X−2Y+7Z = 5X - 2Y + 7Z=5X−2Y+7.