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Random Variablesmedium
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Consider two random variables XXX and YYY where the variance of their sum is Var(X+Y)=8Var(X+Y) = 8Var(X+Y)=8 and the variance of their difference is Var(X−Y)=12Var(X-Y) = 12Var(X−Y)=12. What is the covariance Cov(X,Y)Cov(X, Y)Cov(X,Y)?