Question

A worker takes a random sample of 200 bolts and finds that 30 of them are either too long or too short, thrus making them unusable. Estimate the number of unusable bolts in a production of 17000 bolts.

Answer 1

Looks like a ratio problem. Set up your ratios as fractions, \(\frac{30}{200}=\frac{x}{1700}\), and solve for 'x'.