28. In a random sample of 10% of the daily production, a manufacturing company finds 100 defective parts. In another random sample, 4 out of 20 parts are defective. Find the approximate number of parts the company makes each day. The company makes about parts each day.

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ISBN:9780470458365
Author:Erwin Kreyszig
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Please tell me some other methods to solve this without using proportions

(easier and consistent methods please)

Thanks!

28.
In a random sample of 10% of the daily production, a manufacturing company finds 100 defective parts. In
another random sample, 4 out of 20 parts are defective. Find the approximate number of parts the company
makes each day.
The company makes about parts each day.
(A)
10% is 100
So 100% = 1,000
4
20
B
Set up proportion
x250
1,000
X
x250
20
5,000 parts
Transcribed Image Text:28. In a random sample of 10% of the daily production, a manufacturing company finds 100 defective parts. In another random sample, 4 out of 20 parts are defective. Find the approximate number of parts the company makes each day. The company makes about parts each day. (A) 10% is 100 So 100% = 1,000 4 20 B Set up proportion x250 1,000 X x250 20 5,000 parts
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