The data below shows the number of students in class A having secured different marks.
| Marks | Students in class A |
| 0-2 | 3 |
| 2-4 | 4 |
| 4-6 | 1 |
| 6-8 | 1 |
| 8-10 | 1 |
| 10-12 | 0 |
What is the mean marks of class A?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 3.6.
| Understanding/Application |
|
Mean = Sum of all observation/Total observation Total number of people = (3 + 4 + 1 + 1 + 1) = 10 |
| Mean = [(3 × 1) + (4 × 3) + (1 × 5) + (1 × 7) + (1 × 9)]/10 = [3 + 12 + 5 + 7 + 9]/10 = 36/10 = 3.6 |