Question

1. In a management class, the ratio of boys to girls is 6:7; if there are 18 boys in the class. Find

the number of girls?

Answer 1

There are 21 girls.

Mark at brain least

Answer 2

There are 21 girls.

Explanation:

If the ratio is 6:7, and the number of boys is 18, we divide 18 by 6 to get 3. Which means 3 times 6 is 18. If we multiply the numerator by 3, we do the same to the denominator. 7・3 is 21. Therefore there are 21 girls. (The ratio is 18:21)