Answer
120 possible combinations
Work Step by Step
No. of Phone models = 4
No. of colors = 6
No. of calling plans = 5
Possible combinations = 4 x 6 x 5
= 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: 20
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