Thinking Mathematically (6th Edition)

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 60: 127

Answer

Makes Sense.

Work Step by Step

Yes there is one to one corresponding between average no of hours men sleep and average number of hours women sleep. For example: At age 17, men sleep on average 9.7 while women sleep around 9.3 hours. This makes sense.
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