Respuesta :
Answer:
1/21
Step-by-step explanation:
11 boys + 10 girls = 21 students
We want the ratio of coaches to students
1 coach: 21 students
1/21
Total amount of students is 11+10 which is 21
So 1 coach and 21 students
1:21
So 1 coach and 21 students
1:21