Question

The ratio of boys to girls in Ms. Cunningham's cass is 2 to 3. There are 18 girls in the class.

What is the total number of students in Ms. Cunningham's class?
A 12
B 30
C45
D27

Answer 1

24

Explanation:

2:3= 12:18

Answer 2

B - 30

Explanation:

You need to add 2 and 3 together to find the total students.

The ratio would be:

2 : 3 = 5

x : 18 = x

Since we only know there are 18 girls we can only substitute that in only. Everything else is x.

18 ÷ 3 = 6

To find the scale factor, divide 18 and 3. Which is 6.

5 × 6 = 30

Multiply 5 with the scale factor to find the number of students.