Study carefully the table given below and answer the question asked here under.
The following table gives the marks (out of 100) of five students (i.e. A, B, C, D and E) over the years 2021 to 2025.
| Year | A | B | C | D | E |
|---|---|---|---|---|---|
| 2021 | 75 | 82 | 75 | 84 | 74 |
| 2022 | 90 | 93 | 85 | 86 | 79 |
| 2023 | 96 | 76 | 65 | 85 | 85 |
| 2024 | 92 | 85 | 66 | 81 | 82 |
| 2025 | 86 | 82 | 73 | 80 | 83 |
If we compare the cumulative combined marks of students A and B over the years with those of students C and D, then the marks scored by A and B together are more than those scored by C and D, by approximately what percent ?
A77
B91
C15
D10 ✓ Correct
Correct answer: (D) 10
Explanation
A and B together total 439+418 = 857, while C and D together total 364+416 = 780. The excess is 857 minus 780 = 77. As a percentage of 780 this is 77 divided by 780 times 100, about 9.9, closest to 10.
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