Teaching HSSC TGT 2023 Mock Test (Latest Pattern) Mathematics Statistics Measures of Central Tendency
If for some x ∈ R, the frequency distribution of the marks obtained by 20 students in a test is
| Marks | 2 | 3 | 5 | 7 |
| Frequency | (x + 1)2 | 2x - 5 | x2 - 3x |
x |
then the mean of the marks is
1
2.8
2
3.2
3
3.0
4
2.5
5
Not Attempted