Verified Answer :

Answer is 4.) 15 girls.

If you go 27-5-4=18
               18-5-4=9
                 9-5-4=0
so 5+5+5 (because it's 5 girls to 4 boys, only count the 5's) =15 

Hope this helps! :)

Answer:

2.9

Step-by-step explanation: