College Algebra 7th Edition

Published by Brooks Cole
ISBN 10: 1305115546
ISBN 13: 978-1-30511-554-5

Chapter 9, Counting and Probability - Section 9.1 - Counting - 9.1 Exercises - Page 658: 59

Answer

168

Work Step by Step

We can choose 1 of the 8 workers to clean the rest of the house. Then we can choose the carpet cleaners $7*6/2$ ways, diving by 2 to show that $ab = ba$ as order doesn't matter. The rest can clean windows. $7*6/2*8 = 168$
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