Question

among 1100 boys and 700 girls who have appeared for an examination,42%of the boys and 30 % of the girls passed In the examination.the failed percentage of the total is

Answer 1

no. of boys passed = 42 ℅. therefore. =42/100×1100. = 42 × 11. =462. therefore, no. of boys failed = 1100- 462. = 638. = 638 / 1100 × 100. = 58 ℅. Now, no. of girls passed = 30℅. therefore, = 30/100×700. = 210. therefore, no. of girls failed = 700 - 210. = 490. = 490 / 700 × 100. = 70 ℅ Now, the total fail percentage = 462 + 210. = 672 = 672 / 1800 × 100. ( total no. of students = 1800). = 37.3 ℅ students failed