Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 1 - Problem Solving and Critical Thinking - 1.3 Problem Solving - Exercise Set 1.3: 5

Answer

The unnecessary information in the problem is the salesperson's weekly salary of 350. The extra money = 180

Work Step by Step

Weekly salary of salesperson = 350 Amount received per item for every item sold more than 200 = 15 Number of items sold = 212 Number of items sold more than 200 = 212-200 = 12 So, to find out the extra money he received we don't need the information about the weekly salary. Therefore, extra money he received = 12 x 15 = 180
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