Answer
$\text{or}$
Work Step by Step
In surveys, the word "or" means union.
Thus, the missing expression in the given statement is: $\bf\text{or}$
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 - 2.5 Survey Problems - Concept and Vocabulary Check - Page 102: 2
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