Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)

Published by Pearson
ISBN 10: 0-32193-104-1
ISBN 13: 978-0-32193-104-7

Chapter 12 - Counting and Probability - Section 12.3 Probability - 12.3 Assess Your Understanding - Page 885: 27


$P(T)=0.2$, and $P(H)=0.8.$

Work Step by Step

If $T$:tails, $H$: heads, then if $P(T)=x$, then $P(H)=4x.$ We know that $P(T)+P(H)=1\\x+4x=1\\5x=0\\x=0.2$. Thus, $P(T)=0.2$, and $P(H)=0.8.$
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