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Among the 15 scientists working on a research project 10

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Among the 15 scientists working on a research project, 10 have Ph.D.'s. If four of these scientists are chosen at random to attend a convention.

(a) What is the probability that three of them have Ph.D.'s?
(b) What is the probability that all four have Ph.D.'s?

Reference no: EM13576910

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