Subject: mathqa
Question: in an exam 80 % of the boys and 40 % of the girls passed . the number of girls who passed is 120 , which is 2 / 3 rd of the number of boys who failed . what is the total number of students who appeared for the exam ?
Option: 
A: 1200
B: 3800
C: 3180
D: 2180
Answer: A