The ratio of boys to girls in a group is 7:3. There are 60 more boys than girls. How many girls are there?

Answer 1

b/g = 7/3

b = 60+g

(60+g)/g = 7/3

180 + 3g = 7g

4g = 180

g =180/4 = 45 girls

b =60+45 = 105 boys

105/45 =7/3

3x15 = 45

7x15 = 105

7/3 = 7/3)(1) = 7/3)(15/15) = 7(15)/3(15) = 105/45