A holiday flight from New York to Indianapolis has a probability of 0.75 each time it flies

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A holiday flight from New York to Indianapolis has a probability of 0.75 each time it flies (independently) of taking less than 4 hours.
a. What is the probability that at least one of 3 flights arrives in less than 4 hours?
b. What is the probability that exactly 2 of the 3 flights arrive in less than 4 hours?
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Related Book For  book-img-for-question

Introduction to Probability

ISBN: 978-0716771098

1st edition

Authors: Mark Daniel Ward, Ellen Gundlach

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