11. Suppose that three computer boards in a production run of forty are defectiv
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Question
11. Suppose that three computer boards in a production run of forty are defective. A sample of five is to be selected to be checked for defects. a) How many different samples can be chosen? b) How many samples will contain at least one defective board?11. Suppose that three computer boards in a production run of forty are defective. A sample of five is to be selected to be checked for defects. a) How many different samples can be chosen? b) How many samples will contain at least one defective board?
11. Suppose that three computer boards in a production run of forty are defective. A sample of five is to be selected to be checked for defects. a) How many different samples can be chosen? b) How many samples will contain at least one defective board?
Explanation / Answer
Given, total no. of computer boards N= 40
no. of defective boards =3
a) How many different samples can be chosen?
= 40C5 =
b) How many samples will contain at least one defective board?
=39+38+37
=114
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