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. A political discussion group consists of four Democrats and seven Republicans. Three people are selected...

. A political discussion group consists of four Democrats and seven Republicans. Three people are selected (at random) to attend a conference. a. In how many ways can three people be selected from this group of eleven? b. In how many ways can three Republicans be selected from the seven Republicans? c. Find the probability that the selected group will consist of all Republicans.

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Answer #1

11! (a)11C, = =165 3!(11–3)! 7! (b) 7C3 = = 35 31(7-э)! 7C3 35 11C; 165 (c) probability =- = 0.2121

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