Answer
$15$
Work Step by Step
There are 5 selections for first choice and 3 selections for second choice.
According to multiplication principle of counting, the number of different shirt and tie outfits he can wear is:
$= 5\times3
\\= 15$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 12 - Counting and Probability - Section 12.1 Counting - 12.1 Assess Your Understanding - Page 867: 23
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