Here are six cards. Each card has a number on it.
| 21 | 9 | 13 | 10 | 14 | 14 |
| ---- | --- | ---- | --- | ---- | ---- |
Work out the range of the numbers on the cards.
Work out the mean of the numbers on the cards.
A seventh card is added.
The number on this card is 24.
Hence work out the mean of the numbers on the seven cards.
201 exam-style questions on AQA GCSE Maths Averages. Each one has a worked solution and a mark scheme showing where the marks go.