Mathematics
Consider the table given below :
| Marks | Number of students |
|---|---|
| 0 – 10 | 12 |
| 10 – 20 | 18 |
| 20 – 30 | 27 |
| 30 – 40 | 20 |
| 40 – 50 | 17 |
| 50 – 60 | 6 |
The mean of the marks given above is :
6
18
27
28
Measures of Central Tendency
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Answer
| Marks | Number of students (f) | Class mark (x) | fx |
|---|---|---|---|
| 0 – 10 | 12 | 5 | 60 |
| 10 – 20 | 18 | 15 | 270 |
| 20 – 30 | 27 | 25 | 675 |
| 30 – 40 | 20 | 35 | 700 |
| 40 – 50 | 17 | 45 | 765 |
| 50 – 60 | 6 | 55 | 330 |
| Total | ∑ f = 100 | ∑ fx = 2800 |
By formula,
Hence, option 4 is the correct option.
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