There are 20 girls and 15 boys in a class. (a) What is the ratio of number of girls to the number of boys? b) What is the ratio of number of girls to the students in the class?

Explanation

Number of boys in the class ` =15`

Number of girls in the class ` = 20`

Total number of students in the class ` = 20+15 = 35`

`:.` Ratio of number of girls to the number of boys` = 20/15 = 4/3 = 4:3`

Ratio of number of girls to the students in the class `= 20/35 = 4/7 = 4:7`