Percentage distribution of students qualifying an entrance exam from seven schools A–G, 2020 and 2021. School G: 90 (2020), 135 (2021).
| School | 2020 (%) | 2021 (%) |
|---|---|---|
| A | 21 | 23 |
| B | 14 | 8 |
| C | 16 | 11 |
| D | 10 | 14 |
| E | 18 | 16 |
| F | 9 | 13 |
| G | 12 | 15 |
If P and Q are the average number of students qualifying from Schools B, C and D in 2020 and from Schools E, F and G in 2021 respectively, then Q minus P is
A32 ✓ Correct
B35
C38
D41
Correct answer: (A) 32
Explanation
The answer is 32.
Schools B, C and D in 2020 total 300, so P is 300 divided by 3, which is 100.
Schools E, F and G in 2021 total 396, so Q is 396 divided by 3, which is 132.
The difference Q minus P is 132 minus 100.
That is 32.
The other options do not match this value.
So the answer is 32.
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