| Question | The average marks of eight students in the Mathematics exam are 75. If the highest and lowest marks are removed, then the average marks become 80. If the ratio of the highest marks to the lowest marks is 3 : 1, then the highest marks are what percentage of the sum of the marks obtained by the eight students in the Mathematics exam? | |
| Type | multiple_choice | |
| Option | 15% | correct |
| Option | 18% | incorrect |
| Option | 20% | incorrect |
| Option | 12% | incorrect |
| Solution | Sum of lowest and highest marks= 8 x 75 – 6 x 80 = 120 Highest marks = 120 x 3 / 4 = 90 Required percentage = 90/8x75x100=15% | |
