Find the missing frequency 'f' in the following table
MATHEMATICS · Subjective · A Level · Mathematics · Data presentation and interpretation · Data presentation and interpretation
Problem
Find the missing frequency 'f' in the following table, if the mean of the given data is 18. Hence find the mode.| Daily Allowance | Number of Children |
|---|---|
| 11 – 13 | 7 |
| 13 – 15 | 6 |
| 15 – 17 | 9 |
| 17 – 19 | 13 |
| 19 – 21 | f |
| 21 – 23 | 5 |
| 23 – 25 | 4 |