Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 12 - Data Analysis and Probability - 12-3 Measures of Central Tendency and Dispersion - Practice and Problem-Solving Exercises - Page 742: 12


The 5th number is 99

Work Step by Step

The mean is 91 and the values are:9 9, 86, 76 and 95.You have to find the fifth value. Using the mean formula, you find x: $\frac{99+ 86+ 76+ 95+ x}{5}$=91 -Multiply both sides by 5 to isolate x- 99+86+76+95+x=455 -simplify- 356+x=455 -subtract 356 from both sides to solve for x- x=99 Check your work: $\frac{99+ 86+ 76+ 95+ 99}{5}$=$\frac{455}{5}$=99. So the missing value is 99.
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.