A group of 50 employees recorded the distance they walked to work. The results are summarized in the table.
| Distance (d d\,d km) | Frequency |
|---|---|
| 1 to 5 | 10 |
| 6 to 10 | 16 |
| 11 to 15 | 12 |
| 16 to 20 | 7 |
| 21 to 25 | 5 |
Calculate an estimate for the mean distance walked.
32 exam-style questions on Edexcel GCSE Maths Averages from Frequency Tables. Each one has a worked solution and a mark scheme showing where the marks go.