An all girl college began enrolling boys in 2005. By 2012 the ratio of boys to girls was 3 to 7. If there are 200 more girls than boys how many boys are there?

Answer 1

3/10 are boys
7/10 are girls

total boys = x
total girls = x+200
total students = 2x+200

(3/10)(2x+200) = x

6 x + 600 = 10 x

4 x = 600

x = 150

Answer 2

150 more boys enrolled that year.

Answer 3

if there are boys to girls a ratio of 7:3 and 200 more girls enrolled how many boys will be there.