You are a quality control specialist at a yo-yo factory. The yo-yos that your company makes have a great reputation for working when they come out of the box. However, every once in a while, one of the yo-yo does not work. Out of the 300,000 they made last year, 20 of them did not work. If they make 450,000 this year, how many can you expect will not work? pl help this i need help with