Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter 10 - Section 10.6 - Counting Principles, Permutations, and Combinations - Exercise Set - Page 1103: 17

Answer

This is a problem involving combinations.

Work Step by Step

We know that a medical researcher is choosing 6 people from 13 people for the test. The order in which the six people are selected does not matter because all are selected to test the effectiveness of the same experimental drug. Since the order makes no difference, this is a problem involving combinations.
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