Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 10 Counting Methods and Probability - Chapter Test - Page 737: 24



Work Step by Step

Using the formula for binomial experiments, the probability is: $P(k\leq2)=P(k=0)+P(k=1)+P(k=2)=_{5}C_{0}(0.7)^{0}(0.3)^{5-0}+_{5}C_{1}(0.7)^{1}(0.3)^{5-1}+_{5}C_{2}(0.7)^{2}(0.3)^{5-2}\approx0.163$
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