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(12) 4. An um contains 3 green, 3 red and 4 white balls. Two balls are selected at random without replacement. Let X be the

(12) 4. An um contains 3 green, 3 red and 4 white balls. Two balls are selected at random without replacement. Let X be the number of green and Y be the number of red balls in a sample. 3) Find thejoint pmfof X and Y. b) Find the probability that at most one ball is white. c) Find EX. d} Find E(X|Y = 0)

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