Question

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) The ratio of girls to that of boys = \(\frac{20}{15}\)
\(= \frac{4}{3}\)
\(= 4:3\)

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(b) The ratio of girls to total students = \(\frac{20}{20+15}\)
\(=\frac{ 20}{35}\)

\(= \frac{4}{7}\)
\(= 4:7\)