For six schools A–F (2019–2022): boys percentage among Board exam candidates and the boys−girls difference. Only the stated entries are given.
| School | Year | Boys (%) | Boys − Girls Difference |
|---|---|---|---|
| E | 2019 | 75% | 280 |
| E | 2020 | 60% | 136 |
| E | 2021 | 70% | 264 |
| E | 2022 | 66% | 224 |
| C | 2019 | 44% | 60 |
| C | 2020 | 55% | 24 |
| A | 2020 | 60% | 70 |
| B | 2020 | 48% | 18 |
| B | 2022 | 60% | 90 |
| D | 2020 | 57% | 84 |
| F | 2019 | 44% | 90 |
| F | 2020 | 56% | 96 |
What is the difference between the total number of students appearing from school B in 2020 and that in 2022?
A0 ✓ Correct
B17
C29
D35
Correct answer: (A) 0
Explanation
The difference is 0.
In school B in 2020 the difference 18 is 4 percent of the total, so the total is 450.
In school B in 2022 the difference 90 is 20 percent of the total, so the total is 450.
Both years give a total of 450 students.
The required difference is 450 minus 450.
This equals 0.
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