Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 13 - Counting and Probability - Chapter Review - Chapter Test - Page 869: 13


a)$0.25$ b)$0.55$

Work Step by Step

We know that probability$=\frac{\text{number of favourable outcomes}}{\text{number of all outcomes}}.$ There are $8+5+4+3=20$ bottles in total. a) $5$ are bottles of Coke, hence the probability: $\frac{5}{20}=0.25$ b) $8+3=11$ are bottles of Pepsi or IBC, hence the probability: $\frac{11}{20}=0.55$
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