please help with MATH I have the answer which is ''C'' just need an explanation on how I got the answer.
A worker takes a random sample of 200 bolts and finds that 30 of them are either too long or too short, thus making them unusable. Estimate the number of unusable bolts in a production of 17,000 bolts.

A. 2,260 bolts

B. 2,140 bolts

C. 2,550 bolts

D. 1,610 bolts
I Know the answer is ''C'' I just need an explanation of how to get the answer.