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 - 4-2 The Addition Rules for Probability - Exercises 4-2 - Page 208: 20

Answer

a. $9/32$ b. $15/16$ c. $9/16$

Work Step by Step

a. More than 10 sweatshirts $p=9/32$ b. At least one sweatshirt $p=30/32=15/16$ c. 1–5 or more than 15 sweatshirts P(1–5)=$13/32$, P( more than 15)=$5/32$ P(1–5 or more than 15)=$13/32+5/32=18/32=9/16$
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