Question

In a shipment of 400 parts, 14 are found to be detective. how many defective parts should be expected in a shipment of 1000

Answer 1

400 = 14 detective , 1 = 28/4/7 part , 1000 = 2857/3/7 parts

Answer 2

There's two and a half times as many parts, so you would expect there to be two and a half times as many defective parts.

14x2.5=35

So there should be 35 defective parts :)