Question

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

Answer 1

Given, In a class
The number of girls $=20$
The number of boys $=15$
Hence, total number of students $=20+15=35$
[1 mark]
(a) The ratio of the number of girls to the number of boys $=\frac{20}{15}$$=\frac{4}{3}$$=4:3$
[1 mark]
(b) The ratio of the number of girls to the total number of students in the class $=\frac{20}{35}$$=\frac{4}{7}$$=4:7$.
[1 mark]