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Of the items manufactured by a certain process, 20% are

Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi ISBN: 9780073401331 38

Solution for problem 12E Chapter 4.2

Statistics for Engineers and Scientists | 4th Edition

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Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi

Statistics for Engineers and Scientists | 4th Edition

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Problem 12E

Of the items manufactured by a certain process, 20% are defective. Of the defective items, 60% can be repaired.

a. Find the probability that a randomly chosen item is defective and cannot be repaired.

b. Find the probability that exactly 2 of 20 randomly chosen items are defective and cannot be repaired.

Step-by-Step Solution:

Answer :

Step 1 of 3:

Given, in a process of manufacturing, 20% of the items are defective. In that 20% defectives 60% items can be repaired.

The goal of the problem is

  1. We have to find the probability that a randomly chosen item is defective and cannot be repaired.

      b) we have to find the probability that exactly 2 of 20 randomly chosen items are defective and  

            cannot be repaired.


Step 2 of 3

Chapter 4.2, Problem 12E is Solved
Step 3 of 3

Textbook: Statistics for Engineers and Scientists
Edition: 4
Author: William Navidi
ISBN: 9780073401331

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Of the items manufactured by a certain process, 20% are