Introductory Statistics 9th Edition

Published by Wiley
ISBN 10: 1-11905-571-7
ISBN 13: 978-1-11905-571-6

Chapter 3 - Advanced Exercises - Page 119: 3.92


The minimum score she needs on the final exam to obtain a B grade is 169.

Work Step by Step

The scores obtained from three 100-point tests are as follows: 75, 69 and 87 The scores obtained from 200-point test = X The sum of three 100-point tests and 200-point test = $75+69+87+X$ In order to obtain B grade, $80=(75+69+87+X)/5$ X = 169
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