The table shows information about the number of text messages sent by a group of teenagers during a lunch break.
| Messages | Frequency |
|---|---|
| 0 | 5 |
| 1 | 11 |
| 2 | 8 |
| 3 | xxx |
| 4 or more | 0 |
The group sent a total of 51 messages.
Find the value of xxx.
111 exam-style questions on OCR GCSE Maths Averages from Frequency Tables. Each one has a worked solution and a mark scheme showing where the marks go.