Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 2 - Set Theory - 2.2 Subsets - Exercise Set 2.2 - Page 68: 25


{x|x is a man} ⊂ {x|x is a person}

Work Step by Step

The first set is a proper subset of second set because a man is always a person, but a person need not become a they are not equal sets. Therefore {x|x is a man} ⊂ {x|x is a person}
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