Question: 7.4 Let X and Y be two discrete random variables with a joint probability distribution of f(x, y) = (x+2y ) 27 , x,y=

7.4 Let X and Y be two discrete random variables with a joint probability distribution of f(x, y) =



(x+2y )

27 , x,y= 0, 1, 2.

0, otherwise.

Find the probability distribution of the random variable Z = X + Y .

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