Mathematics
The mean of the given frequency distribution is :
| x | f |
|---|---|
| 30 | 15 |
| 20 | 5 |
= 27.5
= 2.5
Statistics
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Answer
| x | f | fx |
|---|---|---|
| 30 | 15 | 450 |
| 20 | 5 | 100 |
| Total | Σf = 20 | Σfx = 550 |
By formula,
Mean = = 27.5
Hence, Option 3 is the correct option.
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