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Random Variableshard
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Consider two independent variables XXX and YYY such that Var(X)=5Var(X) = 5Var(X)=5 and Var(Y)=10Var(Y) = 10Var(Y)=10. If Z=2X−3Y+7Z = 2X - 3Y + 7Z=2X−3Y+7, what is Var(Z)Var(Z)Var(Z)?