Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 11 - Counting Methods and Probability Theory - 11.3 Combinations - Exercise Set 11.3: 71

Answer

Sample: "In how many ways can a three-member committee be formed from a group of seven students?"

Work Step by Step

Combination problems involve: $\bullet$Selections of r items from a set of n items, $\bullet$Where any item can be chosen only once and $\bullet$Where the order of the selections is unimportant. Sample: "In how many ways can a three-member committee be formed from a group of seven students?" (Selecting r=3 out of n=7 students ... in $ {}_{7}C_{3}$ ways)
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