Question

Boys to girls ratio is 2 to 3. There are 18 girls. What is total number of students

Answer 1

30 students

Explanation:

2:3 = x:18

X = number of boys

`(2)/(3) = (x)/(18)`

multiply 18 by both sides

18 ×
`(2)/(3) = X`

X = 18 ×
`(2)/(3) = 12`

18 + 12 = 30

Answer 2

`(2)/(3)=(boys)/(18)`

3*boys=2*18

3*boys=36

boys=12

12+18=30

total number of students: 30