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Mathematical Statistics with Applications | 7th Edition | ISBN: 9780495110811 | Authors: Dennis Wackerly; William Mendenhall; Richard L. Scheaffer
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Refer to Exercise 3.103. The company repairs the defective

Chapter 3, Problem 106E

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QUESTION:

Problem 106E

Refer to Exercise 3.103. The company repairs the defective ones at a cost of $50 each. Find the mean and variance of the total repair cost.

Reference

A warehouse contains ten printing machines, four of which are defective. A company selects five of the machines at random, thinking all are in working condition. What is the probability that all five of the machines are non-defective?

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QUESTION:

Problem 106E

Refer to Exercise 3.103. The company repairs the defective ones at a cost of $50 each. Find the mean and variance of the total repair cost.

Reference

A warehouse contains ten printing machines, four of which are defective. A company selects five of the machines at random, thinking all are in working condition. What is the probability that all five of the machines are non-defective?

ANSWER:

Solution:

Step 1 of 3:

   Here we need to find the mean and variance of total repair cost.

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