Julio works as a quality control expert in a beverage factory. The assembly line that he monitors produces about 20,000 bottles in a 24-hour 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?

Question

Julio works as a quality control expert in a beverage factory.  The assembly line that he monitors produces about 20,000 bottles in a 24-hour 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?

Ms. Sue · Answer

1/50 * 120 = 120/50 = 2.4 He'll probably reject the line if he finds 3 defective bottles out of 120.