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: $_{10}C_3=120$
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
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