A manufacturing company produces lenses for digital cameras. The defect rate for each lense is 9%. Which of the following testing procedures will result in more production stops?
Procedure A: The company will test 10 lenses per hour, and stops production if 2 or more lenses are defective.
Procedure B: The company will test 20 lenses per hour, and stops production if 4 or more lenses are defective.
I have no idea where to start.