Higher November 2018 Paper 1 Q11
11. Alec bought a house.
By the end of the first year, the value of Alec’s house had increased by 1%.
By the end of the second year, its value had decreased by 10% of its value at the end of the first year.
Use multipliers to work out the overall percentage decrease in the value of Alec’s house for this two-year period. [4]
| Scheme | Marks | Comments |
|---|---|---|
| \(1.01 \times 0.9\) | M1 | |
| 0.909 or equivalent | A1 | |
| \(1 - 0.909\) or 0.091 or equivalent | m1 | FT ‘their 0.909’ or ‘their 90.9(%)’ |
| 9.1% | A1 | If M1 A… m0 then SC1 for a final answer of ‘their 90.9%’, FT ‘their 0.909’ |
| (4) |