In a sample of 26 hand-held calculators, 20 are known to be nonfunctional. If 6 of these calculators are selected at random, what is the probability that exactly 4 in the selection are nonfunctional? Round to the nearest thousandth.
A. 0.667
B. 0.316
C. 0.769
D. 0.300
E. 0

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Draw a probability tree. I would, but I don;t have the patience, and hate statistics with a passion.

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