Basics Of Engineering Economy
Basics Of Engineering Economy
2nd Edition
ISBN: 9780073376356
Author: Leland Blank, Anthony Tarquin
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 6, Problem 9P

A University of Massachusetts study found that married women who work outside the home do about one hour less of housework per week for every $7500 they earn outside the home. Assume that they hire a housekeeper one time per week for $120; that the $7500 is received in uniform amounts of $625 per month; and, that the housekeeper is paid weekly with these payments made before the $625 is received. What rate of return are they making per week on their “investment” in the housekeeper?

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