Foundation November 2021 Unit 2 Q7
7. Gwenan writes down four numbers:
64 89 83 26
(a) Calculate the mean of Gwenan’s numbers. [3]
(b) Every number in Gwenan’s list is increased by 1.
What is the mean of her new list of numbers? [1]
What is the mean of her new list of numbers? [1]
| Scheme | Marks | Comments |
|---|---|---|
| Sum of numbers (262) | M1 | Allow for an unsupported value between 173 and 351. |
| Sum of numbers ÷ 4 | m1 | Award this m1 for ‘their sum’ ÷ 4 |
| 65.5 or equivalent | A1 | CAO. Allow 131/2. If no marks awarded, allow SC1 for (64 + 89 + 83 + 26 ÷ 4 =) 242.5 or equivalent. |
| Scheme | Marks | Comments |
|---|---|---|
| (65.5 + 1 =) 66.5 | B1 | F.T. ‘their mean’ from (a). Allow 133/2. |