Answer:
36
Step-by-step explanation:
The 5 part of the ratio represents 60 girls.
Divide 60 by 5 to find the value of one part of the ratio
60 ÷ 5 = 12 ← value of 1 part of the ratio
The 3 part of the ratio represents the number of boys, hence
3 × 12 = 36 ← number of boys
