4MA0 Higher January 2012 Paper 4 Q4
4 Three positive whole numbers have a median of 7 and a mean of 5
Find the range of these three numbers.
(3)
| Scheme | Marks |
|---|---|
| 1 7 7 | B2 |
| 6 | B1 |
| (Total 3 marks) |
Notes
B2: for 1 7 7 in any order
B1 for three positive whole numbers with either a median of 7 or a sum of 15
SC Award B1 for 0 7 8
B1: cao
Apart from Questions 3, 13(b) and 17(f) (where the mark scheme states otherwise), the correct answer, unless clearly obtained by an incorrect method, should be taken to imply a correct method.