Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 4 - Probability - 4-5 Multiplication Rule: Complements and Conditional Probability - Basic Skills and Concepts: 26

Answer

a) 0.666 b)1

Work Step by Step

a)We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, hence $P(Fraternal \ twins)=\frac{5+5+5+5}{5+0+0+5+5+5+5+5}=0.666.$ b)We know that $probability=\frac{number \ of \ good \ outcomes}{number\ of\ all\ outcomes}$, hence $P(Fraternal \ twins|Boy \ and \ Girl)=\frac{5+5}{0+0+5+5}=1.$
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.