1MA0 Higher November 2016 Paper 2 Q4
4 Here is a five-sided spinner.
The table shows the probabilities that the spinner will land on A or on B or on C or on D.
| Letter | A | B | C | D | E |
|---|---|---|---|---|---|
| Probability | 0.25 | 0.10 | 0.20 | 0.15 |
Kirsty spins the spinner once.
(a) Work out the probability that the spinner will land on E. (2)
Chris is going to spin the spinner 60 times.
(b) Work out an estimate for the number of times the spinner will land either on A or on B. (3)
| Answer | Mark | Notes |
|---|---|---|
| 0.3 | 2 | M1 for \(1 - (0.25 + 0.10 + 0.20 + 0.15)\) oe A1 for 0.3 oe |
| Answer | Mark | Notes |
|---|---|---|
| 21 | 3 | M1 for \(0.25 + 0.10\) (= 0.35) or \(0.25 \times 60\) (= 15) or \(0.10 \times 60\) (= 6) M1(dep) for \(60 \times \text{``}0.35\text{''}\) or \(\text{``}15\text{''} + \text{``}6\text{''}\) A1 cao |