SOLUTION: There are 3 boys for every 2 girls in a class of 25. How many girls are there?

Algebra ->  Permutations -> SOLUTION: There are 3 boys for every 2 girls in a class of 25. How many girls are there?      Log On


   

Question 443104: There are 3 boys for every 2 girls in a class of 25. How many girls are there?
Answer by swincher4391(1107) About Me  (Show Source):
You can put this solution on YOUR website!
Set up a proportion:
In a sample of 3:2, you have 5 kids in all.
So the the ratio of girls to kids in a sample of 5 is 2:5.
So set up a proportion:
%282%2F5%29+=+%28x%2F25%29
5x+=+25%2A2
5x+=+50
x+=+10
Then there are 10 girls in a class of 25.
Hope this helps!