4400 Higher November 2006 Paper 3 Q8
8 Four girls run in a race.
The table shows the probability that each of three girls will win the race.
| Name | Probability |
|---|---|
| Angela | 0.5 |
| Beverley | 0.1 |
| Caris | 0.3 |
| Danielle |
Calculate the probability that either Caris or Danielle will win the race.
(3)
| Scheme | Marks |
|---|---|
| 0.5 + 0.1 or 0.5 + 0.1 + 0.3 or table completed with 0.1 | M1 |
| 1−(0.5+0.1) or 1−(0.5+0.1+0.3) + 0.3 | M1 |
| 0.4 | A1 |
| (3) | |
| (3 marks) |