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Question: X and Y have the joint pmf described below:

(x,y) (1,1) (1,2) (1,3) (2,1) (2,2) (2,3)

p(x,y) 2/15 4/15 3/15 1/15 1/15 4/15

and p(x,y)=0 elsewhere.

Compute E(Y|X=1) and E(Y|X=2).

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