Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

by Bluman, Allan

Published by McGraw-Hill Education

ISBN 10: 0078136334

ISBN 13: 978-0-07813-633-7

Chapter 4 - Probability and Counting Rules - 4-4 Counting Rules - Exercises 4-4 - Page 236: 38

Answer

120

Work Step by Step

If a person can select 3 presents from 10 presents under a Christmas tree, how many different combinations are there? Combinations of 3 out of 10: $_{10}C_3=120$

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