Higher November 2021 Paper 5 Q9
9 A worker received a 10% pay increase in 2017 and a further 10% pay increase in 2018.
The worker says
Over these two years, my pay increased by 10% + 10% = 20%.
The worker is incorrect.
Work out the correct percentage increase.
You must show your working. [5]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Shows actual increase is 21 [%] with correct working | 5 | M3 for [\(k\) ×] 1.1 × 1.1 oe A1 for 121[%] or for 1.21 | “Correct working” requires evidence of at least M3 or alternate convincing approach Allow method marks if contained in correct method involving any invented starting price e.g. M3 for 100 × 1.1 × 1.1 oe |
| OR M1 for 1.1 oe soi A1 for a correct evaluation of the first stage with their value | e.g. for M1A1 uses 80 as value then gives 88 in working | ||
| If 0 scored SC2 for answer 21[%] or SC1 for 121% or 1.21 with no working | |||