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4. Let T be the triangle with verticies (0, 0), (0, 2) and (2, 0). k ( 2x + y ) (2, y ) ET

4. Let T be the triangle with verticies (0, 0), (0, 2) and (2, 0). k ( 2x + y ) (2, y ) ET X and Y are random variables with joint density fxy (x, y) = O else What is the covariance of X and Y

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