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 - 4-5 Probability and Counting Rules - Exercises 4-5 - Page 245: 12

Answer

$0.363$

Work Step by Step

Number of choices of selecting 3 out of 8 science books: $_8C_3$=56 Number of choices of selecting 4 out of 9 math books: $_9C_4$=126 Total choices of selecting 7 books out of 17: $_{17}C_7$=19448 The probability for this problem $p=56\times126/19448=0.363$
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