Foundation November 2021 Paper 1 Q20
20 In 2018, the population of Sydney was 5.48 million.
This was 22% of the total population of Australia.
Work out the total population of Australia in 2018
Give your answer correct to 3 significant figures.
(3)
| Scheme | Marks |
|---|---|
| \(0.22x = 5.48\) oe or (1% =) 5.48 ÷ 22 (= 0.24909…) or 100 ÷ 22 (= 4.54…) | M1 |
| \((x =)\) 5.48 ÷ 0.22 oe or (100% =) 5.48 ÷ 22 × 100 or “0.24909…” × 100 or 5.48 × “4.54…” | M1 |
| Correct answer scores full marks (unless from obvious incorrect working) Answer: 24.9 | A1 |
| (3) | |
| (3 marks) |
Notes
A1: awrt 24.9
| Scheme | Marks |
|---|---|
| \(0.22x = 5\,480\,000\) oe or (1% =) 5 480 000 ÷ 22 (= 249 090.9091…) or 100 ÷ 22 (= 4.54…) | M1 |
| 5 480 000 ÷ “0.22” oe or (100% =) 5 480 000 ÷ 22 × 100 or “249 090.9091…” × 100 or 5 480 000 × “4.54…” | M1 |
| Correct answer scores full marks (unless from obvious incorrect working) Answer: 24 900 000 | A1 |
Notes
A1: awrt 24 900 000