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