A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN: 9780134753119
Author: Sheldon Ross
Publisher: PEARSON
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Chapter 9, Problem 9.2STPE

(a)

To determine

To find:

The probability that both arrived in the first 20 min.

(b)

To determine

To find:

The probability that at least one arrived in the first 30 min.

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