Math / Fractions

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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 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?

Again, I do not want the ANSWER, I need to understand the equation to use to solve it.

  • Math / Fractions -

    1/50 * 120 = ?

    or
    0.02 * 120 = ?

  • Math / Fractions -

    2.40 i think

  • Math / Fractions -

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

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