A political discussion group consists of four Democrats and seven Republicans. Three people areselected (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?

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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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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