NYU has a ratio of 3 girls to 2 boys in class. If there are 12 boys in class, how many girls are there?
1 Answer
Jan 5, 2017
You can use a proportion to solve this problem.
Explanation:
So, from the problem we know 2 things:
- The ratio of girls to boys is 3 to 2.
- Hypothetically, there are 12 boys.
We can use a proportion to solve this problem:
And then we cross-multiply to get this:
Then, using the Division Property of Equality, we divide by 2 on both sides, resulting in the answer: