Answer:
16 girls hope i helped:)
Explanation:
4 to 3 ratio total 28 students
1st round
4girls
3boys
total 7 students
2nd round
4girls +4girls
3boys+ 3 boys
total 14 students
3rd round
4girls+ 4girls + 4girls
3boys+ 3boys+3 boys
total 21 students
4th round
4girls + 4girls + 4girls + 4girls
3boys + 3boys +3boys + 3boys
total 28 students
12boys
16girls