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 - 4-1 Sample Spaces and Probability - Exercises 4-1 - Page 199: 21

Answer

a. $0.43$ b. $0.52$ c. $0.17$

Work Step by Step

a. Has type O blood The probability of choosing one American and has type O blood is $p=0.43$ b. Has type A or B The probability of choosing one American and has type A or B blood is $p=0.4+0.12=0.52$ c. Does not have type O or A The probability of choosing one American and does not have type O or A blood is $p=0.12+0.05=0.17$
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