Question

EXERCISE 12.1 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 total number of students in the class?

Answer 1

(a) 4 : 3

(b) 4 : 7

Explanation:

a)

20:15

divide both by the HCF which is 5

4:3

b) 20 + 15 = 35

20 : 35

divide both by HCF which is 5

4:7