Foundation November 2019 Paper 2 Q14
14 A shop sells compost in 20 litre bags and in 40 litre bags.
One day the shop had two special offers for the compost.
Which offer is the better value for money?
You must show how you get your answer. (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| 40 litres (supported) | P1 | for finding a cost linked to the correct volume for one offer eg 120 litres \(= 3 \times 3.50\) (= (£)10.5(0)) or 120 litres = (£)9 OR for finding cost per litre or litres per £ for one offer eg \(3.50 \div 40\ (= 0.0875)\) or \(9 \div 120\ (= 0.075)\) or \(40 \div 3.50\ (= 11.4...)\) or \(120 \div 9\ (= 13.3...)\) OR for working with bags in the ratio \(2 : 1\) |
| P1 | for finding costs linked to the same volume for both offers eg 120 litres \(= 3 \times 3.50\) (= (£)10.5(0)) and 120 litres = (£)9 OR for finding cost per litre or litres per £ for both offers eg \(3.50 \div 40\ (= 0.0875)\) and \(9 \div 120\ (= 0.075)\) or \(40 \div 3.50\ (= 11.4...)\) and \(120 \div 9\ (= 13.3...)\) OR for a complete process to inform decision | |
| C1 | ‘40 litre bags’ supported by correct comparable values |
Additional guidance
| 120 \(l\) | £10.50 | £9 |
| 80 \(l\) | £7 | £6 |
| 40 \(l\) | £3.50 | £3 |
| 20 \(l\) | £1.75 | £1.50 |
Clear indication that the 40 litre bags are better value for money supported by correct values for comparison