6. It is known that disks produced by a certain company will be defective with probability .01 independently of each other. The company sells the disks in package of 10 and offers a money-back guarantee that at most 1 of the 10 disks is defective. What proportion of packages is returned? If someone buys three packages, what is the probability that exactly one of them will be returned?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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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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6. It is known that disks produced by a certain company will be defective
with probability .01 independently of each other. The company sells the disks in packages
of 10 and offers a money-back guarantee that at most 1 of the 10 disks is defective.
What proportion of packages is returned? If someone buys three packages, what is the
probability that exactly one of them will be returned?
Transcribed Image Text:6. It is known that disks produced by a certain company will be defective with probability .01 independently of each other. The company sells the disks in packages of 10 and offers a money-back guarantee that at most 1 of the 10 disks is defective. What proportion of packages is returned? If someone buys three packages, what is the probability that exactly one of them will be returned?
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