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 - 12-8 Probability of Compound Events - Practice and Problem-Solving Exercises - Page 781: 42


The probability is: P(4 calls) = $\frac{17}{20}.\frac{17}{20}\frac{17}{20}.\frac{17}{20}=\frac{83521}{160000}\approx 52.2 %$

Work Step by Step

The events are independents because calling one person does not affect the probability of the other person not taking the survey. So, write the percent as a fraction which will be the probability: $85 %$ =$ \frac{85}{100}= \frac{17}{20}$ The probability is: P(4 calls) = $\frac{17}{20}.\frac{17}{20}\frac{17}{20}.\frac{17}{20}=\frac{83521}{160000}\approx 52.2 %$
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.