Math / Fractions
posted by lifeontwofeet on .
Here is another one that I am having trouble with.
Julio works as a quality control expert in a beverage factory.The assembly line that he monitors produces about 20,000 bottles in a 24hour 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?
Again, I do not want the ANSWER, I need to understand the equation to use to solve it.

1/50 * 120 = ?
or
0.02 * 120 = ? 
2.40 i think

Right. So when Julio finds the third defective bottle in his sample, he needs to reject the entire line.