1MA0 Foundation November 2016 Paper 2 Q23
23 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 on B. (2)
| Answer | Mark | Notes |
|---|---|---|
| 0.3 | 2 | M1 for \(1 - (0.25 + 0.10 + 0.20 + 0.15)\) oe A1 oe |
| Answer | Mark | Notes |
|---|---|---|
| 6 | 2 | M1 for \(60 \times 0.10\) oe A1 cao |