Posted by Anonymous on Friday, July 31, 2009 at 9:06pm.
Julio works as a quality control expert in a beverage
factory. The assembly line that he monitors produces about 20,000 bottles in a24hour period. Julio samples about 120 bottles an hour and rejects the line if he finds more than 1/50 of the sample to be defective. About how many defective
bottles should Julio allow before rejecting the entire line?
I think this is a division problem and how would I start this?

Math  Ms. Sue, Friday, July 31, 2009 at 9:09pm
1/50 * 120 = 120/50 = 2 2/5
He should reject the line when he finds 3 defective bottles.

Math  Anonymous, Friday, July 31, 2009 at 9:10pm
so it is multiplication problem?

Math  Ms. Sue, Friday, July 31, 2009 at 9:13pm
Yes. In this kind of construction, a fraction of something is a multiplication problem.
Think of 1/2 of 10. You know it's 5.
1/2 * 10 = 10/2 = 5

Math  Anonymous, Friday, July 31, 2009 at 9:23pm
thank you

Math  Ms. Sue, Friday, July 31, 2009 at 9:47pm
You're welcome.
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