At a certain airport 72% of the flights arrive on time. A sample of 20 flights is studied. a.Find the probability that all 20 of the flights were on time. b.Find the probability that exactly 18 of the flights were on time. c.Find the probability that 18 or more of the flights were on time.

At a certain airport 72% of the flights arrive on time. A sample of 20 flights is studied. a.Find the probability that all 20 of the flights were on time. b.Find the probability that exactly 18 of the flights were on time. c.Find the probability that 18 or more of the flights were on time.

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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At a certain airport 72% of the flights arrive on time. A sample of 20 flights is studied.

a.Find the probability that all 20 of the flights were on time.

b.Find the probability that exactly 18 of the flights were on time.

c.Find the probability that 18 or more of the flights were on time.

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