4MA0 Foundation June 2015 Paper 1 Q17
17 On 1st May 2012, the cost of 5.7 grams of gold was 15 960 rupees.
(a) Work out the cost, in rupees, of 4.6 grams of gold on the same day. (2)
The cost of gold decreased by 7.5% from 1st May 2012 to 1st May 2013
(b) Work out the cost, in rupees, of 5.7 grams of gold on 1st May 2013 (3)
| Scheme | Marks |
|---|---|
| 15960 ÷ 5.7 × 4.6 or 15960 ÷ 5.7 (= 2800) | M1 |
| 12880 | A1 |
| (2) |
| Scheme | Marks |
|---|---|
| \(15960 \times \dfrac{7.5}{100}\) oe (= 1197) | M1 |
| 15960 − “1197” | M1 |
| 14763 | A1 |
| (3) | |
| Total 5 marks |
Notes
M1: M2 for 0.925 × 5.7 (= 5.27(25)) AND \(\dfrac{5.27}{5.7} \times 15960\)
M2 \(15960 \times \dfrac{92.5}{100}\) oe
M1: (dep)
NB. Accept 12880 or ans to (a) in place of 15960 for both method marks