On the production line the company finds that 99.7% of products are made correct

On the production line the company finds that 99.7% of products are made correctly. You are responsible for quality control and take batches of 30 products from the line and test them. What number of the 30 being incorrectly made would cause you to shut down production?
A. Less than 30
B. Less than 29
C. Less than 25
D. Less than 28

"Get 15% discount on your first 3 orders with us"
Use the following coupon
"FIRST15"

Order Now