Discrete Mathematics and Its Applications, Seventh Edition

Published by McGraw-Hill Education
ISBN 10: 0073383090
ISBN 13: 978-0-07338-309-5

Chapter 7 - Section 7.4 - Expected Value and Variance - Exercises - Page 492: 7

Answer

170 points out of the possible 200.

Work Step by Step

By linearity of expectation: The expected number of T/F correct is 50(.9) = 45. The expected number of M/C correct is 25(.8) = 20. So we expected 45*2 + 20*4 = 170 points out of the possible 200.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.

GradeSaver will pay $15 for your literature essays
GradeSaver will pay $25 for your college application essays
GradeSaver will pay $50 for your graduate school essays – Law, Business, or Medical
GradeSaver will pay $10 for your Community Note contributions
GradeSaver will pay $500 for your Textbook Answer contributions