Correct Answer - Option 1 : 54·5%
Given
Number of boys = 1100
Number of girls = 900
Percentage of boys passed in examination = 50%
Percentage of girls passed in examination = 40%
Calculation
Number of boys passed = 50% of 1100
⇒ 550
Number of boys failed = 1100 - 550 = 550
Number of girls passed = 40% of 900
⇒ 360
Number of girls failed = 900 - 360 = 540
Total number of students = 1100 + 900 = 2000
Total number of students failed = 550 + 540 = 1090
Percentage of students failed = (1090/2000) × 100 = 54.5%