The task is to generate the correct answer for a given math problem.
--------
Question: Problem: a certain elevator has a safe weight limit of 2,000 pounds . what is the greatest possible number of people who can safely ride on the elevator at one time with the average ( arithmetic mean ) weight of half the riders being 200 pounds and the average weight of the others being 230 pounds ?

Answer: 9


Question: Problem: how much interest will $ 8,000 earn in 9 months at an annual rate of 6 % ?

Answer: $ 360


Question: Problem: ramu bought an old car for rs . 42000 . he spent rs . 15000 on repairs and sold it for rs . 64900 . what is his profit percent ?

Answer:
13.8