Question

(CO 3) On the production line the company finds that 85.6% 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?

Answer 1

Answer and explanation:

There should be 85.6% correctly made products

If there is less than 85.6% correctly made products then production would be shut down

therefore 100-85.6= 14.4% of products can be incorrectly made and not more than that

In 30 batches 14.4% =0.144*30=4.32 products

Therefore there must not be more than 4.32 products incorrectly made in a batch of 30 else production is shut down