Practicing Success
Study the following table and answer the question: Percentage of marks obtained by six students in five subjects A, B, C, D & E.
Total marks obtained by Amit, Abhi and Anuj in subject E is what percent more than the total marks obtained by all the six students in subject B? (correct to one decimal! place) |
8.4 7.2 7.5 8.5 |
7.5 |
Total marks of Amit, Abhi and Anuj in subject E = 80% of 150 + 74% of 150 + 84% of 150 = \(\frac{4}{5}\) × 150 + \(\frac{37}{50}\) × 150 + \(\frac{21}{25}\) × 150 = 120 + 111 + 126 = 357 Total marks of all students in B = ( 85% + 65% + 75% + 55% + 65% + 70% ) of 80 = \(\frac{415}{100}\) × 80 = 332 Required percentage = \(\frac{25}{332}\) × 100 = 7.53% = 7.5% (correct to one decimal! place) |