a company has 15 managers and 75 associates . the 15 managers have an average salary of $ 90000 . the 75 associates have an average salary of $ 30000 . what is the average salary for the company ?	Choose the correct choice
A) $ 35,000 B) $ 40,000 C) $ 55,000 D) $ 65,000 E) $ 75,000

Rationale: another method is to get ratios say 30000 = a and we know the # of people are in 1 : 5 ratio average = ( 3 a * 1 + a * 5 ) / 6 = 8 a / 6 = 40000 answer is b . $ 40,000
Answer: B