Foundation November 2019 Paper 1 Q13
13.
(a)
Eva’s grandchildren all live in Wales or Australia.
\(\dfrac{2}{7}\) of her grandchildren live in Wales.
15 of her grandchildren live in Australia.
How many grandchildren does Eva have? [3]
(b)
Eva lives in Wales.
When she goes to Australia for a visit, she always changes £400 into Australian dollars (A$).
When she went in 2018, the exchange rate was £1 = A$ 1.70.
When she went in 2016, the exchange rate was £1 = A$ 2.00.
How many more Australian dollars did Eva receive in 2016 than she did in 2018? [3]
| Scheme | Marks | Comments |
|---|---|---|
| 15 (grandchildren) is \(\dfrac{5}{7}\) si | B1 | implied by 15 ÷ 5 |
| 3 (grandchildren) is \(\dfrac{1}{7}\) oe si | M1 | Implies B1 Allow for sight of 6 (grandchildren in Wales) or for \(\dfrac{5}{7} = \dfrac{15}{21}\); implied by (15 ÷ 5) × 7 |
| 21 | A1 | CAO |
| Scheme | Marks | Comments |
|---|---|---|
| (2 – 1.70) × 400 oe | M2 | M1 for 2 × 400 (= 800) or for 400 × 1.7[0] (= 680) or for 2 – 1.7(0) (= 0.3(0)) |
| 120 | A1 | CAO |
| (6) |