Answer: 36 girls
Explanation:
In a ratio, if possible, simplify first. Once the ratio is simplified you can multiply both numbers by the same number and the ratio will remain a ratio (which can be simplified). In this case, we can divide 24 by 2, because there are 24 boys in a ratio of 2 boys to 3 girls. The result is 12, and when we multiply 12 by 3 (the ratio for girls) we get 36. Therefore, the answer is 36 girls.