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 average of the number of girls studying in all six classes A to F is
A41 ✓ Correct
B42
C43
D44
Correct answer: (A) 41
Explanation
The answer is 41.
The number of girls is the class strength times the girls' fraction of the ratio.
The girls are 48, 18, 36, 42, 54 and 48 for Classes A to F.
Their sum is 246.
The average is 246 divided by six classes.
That is 41.
So the answer is 41.
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