In a group of students, the ratio of girls to boys is 3 to 2. If there are 15 girls, how many total students are there?

Question

o 10

o 25

o 30

o 20

Answer 1

Another way: girls are 3/(3 +2) = 3/5ths of the students. (3/5) x = 15 girls where x = total students.

x = (5/3)15 = 25 students. Could also do 0.6x = 15 -> x = 15/0.6 = 25

Answer 2

G/B = 3/2 = 15/x

3x = 30

x = 30/3 = 10 = number of boys

total G+B = 15 + 10 = 25 total students