Subject: mathqa
Question: of the 120 passengers on flight 750 , 60 % are female . 10 % of the passengers sit in first class , and the rest of the passengers sit in coach class . if 1 / 3 of the passengers in first class are male , how many females are there in coach class ?
Option: 
A: 44
B: 56
C: 64
D: 50
Answer: C