Question

In a class othe ratio of the number of boys to the number of girls is 5:6.if there are 20 boys in the xlass, how any pupils are in the class

Answer 1

Let the number of girls be x.

According to the question,

`\implies \: (5)/(6) = (20)/(x)`

`\implies \: 5x = 20 * 6`

`\implies \: 5x = 120`

`\implies \: x = \cancel(120)/(5)`

`\implies \: x = 24`

`\cal \therefore \: Number \: of \: girls \: are \: 24.`

Now,

Pupils in the class = Boys + Girls

`\rightarrow20 + 24`

`\rightarrow44`

Total number of pupils are 44 .

Answer 2

There would be 24 girls in the class.

5:6 is equal to the proportion 20:24. You know that the number of boys is 20, which is 4 times the ratio of boys, so you multiply 6 by 4 to get 24.