Question

Please help?

The ratio of boys to the total number of students in a school play is 4:7. There are 9 girls in the school play.How many students are in the school play?

Answer 1

4:7

4/7 = boys

3/7 = girls

3*3 = 9
7*3= 21

9 out of the 21 students are girls.

There are 21 students in the school play.

This is just a little extra for your understanding:

4/7
4*3 = 12
7*3 = 21

12 out of the 21 students are boys.