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: 75

Answer

n(A) = 4

Work Step by Step

Given A={x|x is the letter in the word five} From the given question. Five is word which contains four Letters ‘F’,’I’,’V’,’E’ That is in the given set there are four letters. The cardinal number for each set is formed by calculating the number of elements in each set. Therefore the cardinal number for given set A is n(A) = 4.
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