Correct Answer - Option 4 :
28%
Calculation:
Total number of students = 6300
Number of boys = 5/9 × 6300
⇒ 3500
∴ number of girls = (6300 - 3500)
⇒ 2800
Number of boys enrolled in Painting = 621
Number of students enrolled in Quiz = 36% of 6300 = 2268
Number of girls enrolled in Quiz = 640
∴ number of boys enrolled in quiz = 2268 – 640
⇒ 1628
∴ Required percentage = 640/2268 × 100
⇒ 28.21% ≈ 28%
The total number of girls in Quiz is approximately 28% of the total number of students in Quiz.