Marks12345Frequency22844 The table above show t... - JAMB Mathematics 2010 Question
| 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
A
3.1
B
3.0
C
3.2
D
3.3
correct option: 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 = | ∑fχ |
| ∑f |
| = | 66 |
| 20 |
= 3.3
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