Question

The ratio of the number of girls to the number of all students in the class is 4 to 9. Can there be 20 students in that class?

Answer 1

No

Explanation:

1. 20 ÷ 9 = 2.222222222
2. 9 does not go evenly into 20, and there can't be a fraction of a student, so the answer is no.

I hope this helps!