Answer
$0.36015$
Work Step by Step
Probability of success: $.7$
Probability of failure: $(1-.7)=.3$
The probability of one failure out of five attempts (implies four successes) is $(.7)^{4}\times (.3)\times 5C4=.36015$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 9, Counting and Probability - Section 9.3 - Binomial Probability - 9.3 Exercises - Page 675: 8
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