The mean of the following distribution is 18.
| Class interval | Frequency |
|---|---|
| 11 – 13 | 3 |
| 13 – 15 | 6 |
| 15 – 17 | 9 |
| 17 – 19 | f |
| 19 – 21 | 7 |
| 21 – 23 | 5 |
| 23 – 25 | 4 |
What is the value of f ?
Mathematics
2014
CDS Elementary Mathematics 2014
CDS 2014
Options
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