Elementary Statistics (12th Edition)

Published by Pearson
ISBN 10: 0321836960
ISBN 13: 978-0-32183-696-0

Chapter 5 - Discrete Probability Distributions - 5-4 Parameters for Binomial Distributions - Beyond the Basics - Page 228: 22



Work Step by Step

We need to achieve that $P(X\geq24)\geq0.98$, let's check when the equality is true. $P(X\geq24)=1-\sum_{x=0}^{23}{n \choose x}\cdot 0.2^x \cdot 0.8^{n-x}=0.98$, and we are looking for the n this is true for. n=170 satisfies the equation, this is the minimum number of integrated circus boards.
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