Percentage distribution of students in six classes A–F and boys:girls ratio. Total students = 600.
| Class | Students (%) | Boys:Girls |
|---|---|---|
| A | 20% | 3:2 |
| B | 12% | 3:1 |
| C | 16% | 5:3 |
| D | 15% | 8:7 |
| E | 21% | 4:3 |
| F | 16% | 1:1 |
The difference between the number of boys and the number of girls in all six classes A to F together is
A102
B114
C106
D108 ✓ Correct
Correct answer: (D) 108
Explanation
The answer is 108.
The boys across the six classes are 72, 54, 60, 48, 72 and 48, which total 354.
So the girls total 600 minus 354, which is 246.
The difference between boys and girls is 354 minus 246.
That is 108.
The other options do not match this value.
So the answer is 108.
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