Answer
$mnp$ elements
Work Step by Step
$A \times B \times C$ has as elements every tuple of the form $(a, b, c)$. Thus using the product rule of counting, it has $mnp$ elements.
Discrete Mathematics and Its Applications, Seventh Edition
by Rosen, Kenneth
Published by
McGraw-Hill Education
ISBN 10:
0073383090
ISBN 13:
978-0-07338-309-5
Chapter 2 - Section 2.1 - Sets - Exercises - Page 126: 36
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