Respuesta :

Answer:

3 : 2

Step-by-step explanation:

9 of them are boys which means 15-9 = 6 girls. 9 : 6 in which we simplified to get 3 : 2.

3:2

example:
15-9=6
it would be
9:6
then you would simplify it making it:
3:2

3 girls for every 2 girls