Foundation November 2024 Paper 1 Q11
11
The multipack costs 10% less than 6 single bags.
Work out the cost of the multipack. [4 marks]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 – total cost then reduction | ||
| \(55 \times 6\) or 330 | M1 | oe |
| their \(330 \div 10\) or 33 | M1dep | oe |
| their \(330 -\) their 33 or 297 | M1dep | oe dep on M2 \(55 \times 6 \times 0.9\) implies M3 |
| 2.97 or 297p | A1 | condone £2.97p |
| Alternative method 2 – reduction then total cost | ||
| \(55 \div 10\) or 5.5 | M1 | oe |
| \(55 -\) their 5.5 or 49.5 | M1dep | oe \(55 \times 0.9\) implies M2 |
| their \(49.5 \times 6\) or 297 | M1dep | oe dep on M2 |
| 2.97 or 297p | A1 | condone £2.97p |
| Alternative method 3 – buying 10% fewer bags | ||
| \(6 \div 10\) or 0.6 | M1 | oe |
| \(6 -\) their 0.6 or 5.4 | M1dep | oe \(6 \times 0.9\) implies M2 |
| their \(5.4 \times 55\) or 297 | M1dep | oe dep on M2 |
| 2.97 or 297p | A1 | condone £2.97p |
Additional guidance
Working may be in £ or p or a mixture for up to M3
Ignore units for up to M3
Use the Alt that awards the best mark
Allow a maximum of one error in each build-up method