4MA0 Foundation January 2017 Paper 1 Q16
16 Three integers have a mean of 7, a median of 5 and a range of 14
Find the three integers.
(2)
| Scheme | Marks |
|---|---|
| 3 × 7 (=21) | M1 |
| 1, 5, 15 | A1 |
| (2) | |
| (2 marks) |
Notes
M1: or for 3 numbers with a total of 21
or 3 numbers with a median of 5
or 3 numbers with a range of 14
or \((a + c =)\ 3 \times 7 - 5\ (=16)\)
A1: numbers can be in any order