Foundation June 2022 Paper 2 Q6
6 Here are two special offers for buying dog food.
| Special offer A Normally \(\$\)1.40 a tin Special offer Buy 1 tin, get 1 tin half price |
Special offer B Normally pack of 6 tins for \(\$\)7.20 Special offer 20% off each pack of 6 tins |
Gaspar buys 24 tins of dog food using special offer A.
Anna buys 24 tins of dog food using special offer B.
Work out the difference between the amount that Gaspar pays and the amount that Anna pays.
(4)
| Scheme | Marks |
|---|---|
| 12 × 1.40 + 12 × 0.5 ×1.40 (=25.20) oe eg (1.4 + 0.7) × 12 (= 25.20) | M1 |
| 0.8 × 7.20 × “4” (=23.04) oe or “4” × 7.20 – 0.2(“4” × 7.20) oe eg 28.80 – 5.76 (= 23.04) where 4 = 24 ÷ 6 | M1 |
| 12 × 1.40 + 12 × 0.5 ×1.40 − 0.8 × 7.20 × 4 or “25.20” – “23.04” | M1 |
| 2.16 | A1 |
| (4) | |
| (4 marks) |
Notes
M1: correct method to find the cost for offer A
M1: indep
correct method to find the cost for offer B
M1: dep on M2
A fully correct method to find the difference
A1: allow –2.16