Geometry: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281159
ISBN 13: 978-0-13328-115-6

Chapter 10 - Area - 10-8 Geometric Probability - Practice and Problem-Solving Exercises - Page 672: 17

Answer

$\dfrac{2}{9}$ or, $22.2 \%$

Work Step by Step

The area of shaded region is equal to $\dfrac{80}{360}\times \pi (3)^2=2 \pi \ in.^2$ Total area $=\pi \times (3)^2=9 \pi \ in.^2$ Now, the probability that the point lies in the shaded region is the ratio of area of the shaded region to the total area: P(area of shaded region)$=\dfrac{2 \pi}{9 \pi}=\dfrac{2}{9}$ or, $22.2 \%$
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