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Let X and Y be jointly distributed random variables with means, E(X) = 1, E(Y) =...

Let X and Y be jointly distributed random variables with means, E(X) = 1, E(Y) = 0, variances, Var(X) = 4, Var(Y ) = 5, and covariance, Cov(X, Y ) = 2.

Let U = 3X-Y +2 and W = 2X + Y . Obtain the following expectations:

A.) Var(U):

B.) Var(W):

C. Cov(U,W):

ans should be 29, 29, 21 but I need help showing how to solve.

Math   Statistics-And-Probability   
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