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2.70 Let X and Y be random variables with joint density function _ 43:3), 0 2.70 Let Xand Y be random variables with joint density

2.70 Let X and Y be random variables with joint density function _ 43:3), 0

2.70 Let Xand Y be random variables with joint density function {0 4xy, 0 < x, y < 1, elsewhere. Find the expected value of Z =

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