2450 boys and 1750 girls are examined in a test; 42% of the boys and 36% of the girls pass the test. The percentage of the total who failed is —

Correct option is C

Ans. (c)
Sol.
· Boys: 2450, 42% passed → 1029 passed
· Girls: 1750, 36% passed → 630 passed
· Total passed = 1029 + 630 = 1659
· Total students = 2450 + 1750 = 4200
· Failed = 4200 - 1659 = 2541
Failed % = (2541 / 4200) × 100 ≈ 60.5%
Wait – this suggests (c) 60.5 may be correct. Let’s recheck:
Actual values:
· 2450 × 0.42 = 1029
· 1750 × 0.36 = 630
· Total passed = 1659
· Total failed = 2541
· (2541 / 4200) × 100 ≈ 60.5%