Answer
5
Work Step by Step
A ={17,19,21,23.25}
The cardinal number for each set is determined by the number of elements in the set.
Therefore in the given set A there are 5 elements.
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 2 - Set Theory - 2.1 Basic Set Concepts - Exercise Set 2.1 - Page 59: 67
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