Here is a list of eight numbers. One of the numbers is hidden.
| 5 | 12 | 8 | 15 | 10 | 6 | 11 | ? |
| ---- | --- | --- | --- | --- | --- | --- | --- |
The mean of the numbers is 10.
Find the value of the hidden number.
Practise Edexcel GCSE Maths Averages with exam-style questions for Foundation and Higher tier. 48 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.