There are 400 students at Cayley H.S., where the ratio of boys to girls is 3:2. There are 600 students at Fermat C.I., where the ratio of boys to girls is 2:3. When considering all the students from both schools, what is the ratio of boys to girls?
Answer Choices
A. 2:3
B. 12:13
C. 1:1
D. 6:5
E. 3:2