Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Published by McGraw-Hill Education
ISBN 10: 0078136334
ISBN 13: 978-0-07813-633-7

Chapter 4 - Probability and Counting Rules - 4-4 Counting Rules - Exercises 4-4 - Page 235: 1

Answer

$100000$ $30240$

Work Step by Step

How many 5-digit zip codes are possible if digits can be repeated? Each digit can be 0 to 9, the total is $10^5=100000$ If there cannot be repetitions? First digit gets 10 choices, second gets 9, etc. the total is $10\times9\times8\times7\times6=30240$
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