Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 10 Counting Methods and Probability - 10.6 Construct and Interpret Binomial Distributions - 10.6 Exercises - Skill Practice - Page 728: 11



Work Step by Step

The general formula for the distribution of the heads and tails should be found. The chance of having any specific side of the coin is $1/2$ and the way to choose n heads is $_{20}C_n$. $$_{20}C_2.*(1/2)^{20}=\boxed{0.0001811981201171875}$$
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.