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Handwritten solution not required correct answer will get instant upvote if var(x) = 10 var(y) = 15 and cov(X, Y)= -7 what is var2x+3y

Handwritten solution not required correct answer will get instant upvote

if var(x) = 10 var(y) = 15 and cov(X, Y)= -7 what is var2x+3y

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