Intermediate June 2022 Unit 2 Q3
3. By first expressing all the amounts below in litres, calculate the mean of the three amounts. [6]
1·25 litres 2·73 pints 1615 ml
| 1·25 litres | 2·73 pints ≈ ………………… litres | 1615 ml = ………………… litres |
Mean of the three amounts = …………………… litres
| Scheme | Marks | Comments |
|---|---|---|
| Answer lines take precedence | ||
| 2·73 (pints) ÷ 1·75 or 2·73 (pints) × 4/7 | M1 | |
| 1·56 (litres) | A1 | Allow use of 568ml or 570ml ≈ 1 pint leading to an answer of 1·55 or 1·56. |
| 1·615(0) (litres) | B1 | |
| 1·25 + 1·56 + 1·615 | M1 | (= 4·425) FT 1·25 + ‘their 1·56’ + ‘their 1·615’. Award M1 for 1·25 + 2·73 + 1615. |
| ÷ 3 | m1 | |
| 1·475 (litres) or 1·47 (litres) or 1·48 (litres) | A1 | Allow 1·5 (litres) from correct working. Note: An answer of (1618.98/3 =) 539·66 or 540 or 539·6 or 539·7 implies M1m1A1. |