Here are six cards. Each card has a number on it.
| 19 | 7 | 11 | 8 | 15 | 15 |
Verify that the range of the numbers on the cards is 12.
Verify that the mean of the numbers on the cards is 12.5.
201 exam-style questions on AQA GCSE Maths Averages. Each one has a worked solution and a mark scheme showing where the marks go.