Marks | 1 | 2 | 3 | 4 | 5 |
Frequency | 2 | 2 | 8 | 4 | 4 |
The table above show the marks obtained in a given test.
Find the mean mark
3.1
3.0
3.2
3.3
Correct answer is D
Mark(χ) | f | fχ |
1 | 2 | 2 |
2 | 2 | 4 |
3 | 8 | 24 |
4 | 4 | 16 |
5 | 4 | 20 |
∑f = 20 | ∑fχ = 66 |
Mean=∑fx∑f
= 6620
= 3.3