A factory produced 32 tennis rackets, and 2 were defective. If the factory produces 80 tennis rackets, predict how many would you expect to NOT be defective.

We know from this that for every 30 perfect racket produced, 2 defective rackets are produced. When simplified, we find that for every 15 perfect rackets, 1 defective racket is produced. Set up the proportion.

1/15 = x/80

Cross multiply, you get the following.

15x = 80

Divide by 15.

x = 5.33

Because. 33 rackets cannot be produced, approximately 5 defective rackets will be produced.