Question

In a class, 60% of students are girls and 40% are boys. By admitting 20 girls and 30 boys, the ratio of girls to boys becomes 8:7. What must be the number of girls and number of boys originally in the class?

Answer 1

Let the total number of students be x.

Given, 60% of students are girls.

Given, 20 girls and 30 boys are admitted in the class.

Also, the ratio of girls to boys becomes 8:7.

\(\therefore\) 60 girls and 40 boys were originally present in the class.