4MA0 Foundation June 2014 Paper 2 Q18
18 Sarah has a biased 4-sided spinner.
The spinner can land on 1, 2, 3 or 4
The probability that the spinner will land on 1, 2 or 4 is given in the table.
| Number | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| Probability | 0.4 | 0.35 | 0.1 |
Work out the probability that the spinner will land on 3
(2)
| Scheme | Marks |
|---|---|
| 1 − (0.4 + 0.35 + 0.1) | M1 |
| 0.15 | A1 |
| (2) | |
| (2 marks) |