## Thinking Mathematically (6th Edition)

Published by Pearson

# Chapter 2 - Set Theory - 2.1 Basic Set Concepts - Exercise Set 2.1: 73

n(D) = 1

#### Work Step by Step

Given D={Five} The cardinal number for each set is formed by calculating the number of elements in each set. From the given equation there is only one elements in the set that have five. Therefore the cardinal number of D n(D) = 1.

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