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Four green marbles are selected, one at the time from bin of marbles containing 6 black, 6 red and 6 green marbles. Let x represent number of green marbles drawn in 4 draws.

A)  If this experiment is completed without replacing marbles, describe why x is not the binomial random variable.

B)  If this experiment is completed with replacement of marbles, describe why x is binomial random variable.

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