Question

the ratio of boys to girls in class 701 is 3:5. There are 12 more girls than boys in the class. How many total students are in class 701?

Answer 1

3 girls / 5 boys = 12 girls / x.

x=( 5 boys * 12 girls) / 3 girls= 20 boys.

You can also do it by a rule of 3:

3 girls---------------------5 boys

12 girls-------------------- x

x=( 5 boys * 12 girls) / 3 girls= 20 boys.

Total students=12 girls + 20 boys= 32 students.

Answer: There are 20 children and 32 students in total, in room 701.