4400 Higher June 2008 Paper 3 Q10
10 Cara’s salary was increased from $28 250 to $29 832
(a) Work out the percentage increase in Cara’s salary. (3)
Pedro’s salary was increased by 5.2%.
After the increase, his salary was $28 141
(b) Work out his salary before the increase. (3)
| Scheme | Marks |
|---|---|
| 29 832 − 28 250 or 1582 seen | M1 |
| M1 | |
| 5.6 | A1 |
| (3) |
Notes
M1: or M1 for \(\frac{29832}{28250}\) or 1.056 or 105.6, M1 for “1.056” − 1 or “105.6” − 100
or M1 for \(\frac{28250}{29832}\) or 0.9469... or 94.69..., M1 for 1 − “0.9469” or 100 − “94.69”
M1: for \(\dfrac{1582}{28250}\) or \(\dfrac{1582}{29832}\) or 0.056 or 0.053...
A1: cao (Do NOT award for 5.3)
| Scheme | Marks |
|---|---|
| \(\dfrac{28141}{1.052}\) or \(28141 \times \dfrac{100}{105.2}\) | M2 |
| 26 750 | A1 |
| (3) | |
| (6 marks) |
Notes
M2: for \(\dfrac{28141}{1.052}\) or \(28141 \times \dfrac{100}{105.2}\)
M1 for \(\dfrac{28141}{105.2}\), 105.2% = 28141 or 267.5(0) seen
A1: cao