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Random Variablesmedium
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Consider two independent discrete random variables XXX and YYY. If Var(X)=5Var(X) = 5Var(X)=5 and Var(Y)=3Var(Y) = 3Var(Y)=3, what is the variance of the combined variable W=2X−3Y+7W = 2X - 3Y + 7W=2X−3Y+7?