Question

12. All items produced in a factory are checked for defects. Of the 300 items checked, 3% were found to be defective. How many of the items checked worked correctly?​

Answer 1

291

Explanation:

The 3% of 300 is given by

`300(0.03) = 9`

so you have 9 defective items. This is 291 (from 300-9) items worked correctly.

ANOTHER WAY
if 3% are defective, 97% do work. So 97% of 300 is:


`300(0.97)=291\\`
So 291 items.