Higher November 2020 Paper 6 Q10
10 Paintings are sold in an art gallery.
The cost of a painting has \(k\)% commission added to it.
Tax of 15% is then added to the total cost to give the price to pay.
Layla correctly calculates the price to pay by multiplying the cost of the painting by 1.403.
Work out the value of \(k\). [3]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 22 | 3 | M2 for 1.403 ÷ 1.15 oe soi by 1.22 or B1 for 1.15 soi Alternative method : If starting from \((1 + k/100) \times 1.15 = 1.403\) M2 for reaching \(1.15k/100 = 0.253\) or B1 for the 1.15 | Condone answer 22% |