4MA0 Foundation June 2016 Paper 2R Q21
21 Here is a list of numbers written in order of size.
3 6 \(x\) \(y\)
The numbers
| have a median of 8 have a mean of 11 |
Find the value of \(x\) and the value of \(y\).
(3)
| Scheme | Marks |
|---|---|
| \(x = 10\) | B1 |
| \(3 + 6 + x + y = 4 \times 11\) oe | M1 |
| \(y = 25\) | A1 |
| (3) |
Notes
M1: Showing that the total of the 4 numbers is 4 × 11 oe, eg \(x + y = 35\) (ft incorrect \(x\) for M1) or values of \(x\) and \(y\) that total 35 (where \(x \ne 10\), \(y \ne 25\))