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: 77

Answer

n(B) = 5

Work Step by Step

Given B={x|x belongs to N where 2 $\leq$ x <7} From the given question. the given set represents the natural numbers which are greater than 2 but less than7 Those numbers are 2,3,4,5,6. The set contains 5 elements. The cardinal number for each set is formed by calculating the number of elements in each set. Therefore the cardinal number for given set B is n(B) = 5.
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