Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 8 - Section 8.5 - Counting and Introduction to Probability - Exercise Set: 33

Answer

$\frac{1}{20}$

Work Step by Step

Since 10 of the 200 people tested had no change in blood pressure so the probability is $\frac{10}{200}=\frac{10\div10}{200\div10}=\frac{1}{20}$
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