Foundation November 2022 Unit 2 Q16
16. 125 pupils were asked which one of four primary schools they attended.
(a) One of the pupils is chosen at random.
Complete the table below to find the probability that the pupil chosen went to Ysgol Bryn. [2]
Complete the table below to find the probability that the pupil chosen went to Ysgol Bryn. [2]
| Ysgol Aber | Ysgol Bryn | Ysgol Castell | Ysgol Dewi | |
|---|---|---|---|---|
| Probability | 0·08 | …………… | 0·2 | 0·28 |
(b) How many of the 125 pupils went to Ysgol Dewi? [2]
| Scheme | Marks | Comments |
|---|---|---|
| 1 – (0·08 + 0·2 + 0·28) or equivalent | M1 | For the complete method. |
| = 0·44 or equivalent. | A1 | If no marks awarded, award SC1 for 55 pupils for Ysgol Bryn. |
| Scheme | Marks | Comments |
|---|---|---|
| 0·28 × 125 or equivalent. | M1 | |
| = 35 ISW | A1 | Unsupported 35/125 or equivalent implies M1A0. |