Algebra 2 Common Core

by Hall, Prentice

Published by Prentice Hall

ISBN 10: 0133186024

ISBN 13: 978-0-13318-602-4

Chapter 11 - Probability and Statistics - 11-3 Probability of Multiple Events - Practice and Problem-Solving Exercises - Page 692: 23

Answer

$39\%$

Work Step by Step

Use the formula for mutually exclusive events to find the probability of the events not happening at the same time. The formula is $P(S$ $or$ $T)=P(S)$ $+$ $P(T)$. We have $P(S)=12\%$ and $P(T)=27\%$ . Plug the values into the formula: $P(S$ $or$ $T)$ = $12\%+ 27\%$ $P(S$ $or$ $T)$ = $39\%$

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