We can write the ratio like so:
boys:girls = 3:2
If there are 12 boys in the class, we can set up a proportion to find the number of girls in the class like so:
[tex]\frac{3}{2} = \frac{12}{girls}[/tex]
Using cross multiplication, we can find that 24 = 3 * girls. Dividing both sides by 3, we get girls = 8.
So, using the ratio boys:girls = 3:2 and knowing that there are 12 boys in the class, we can find that the number of girls is 8.
Since the question is just asking for the proportional representation, you'll probably just want to submit [tex]\frac{3}{2} = \frac{12}{girls}[/tex] as the answer.
