The table shows the probabilities that a biased spinner will land on 1, on 2, on 4 and on 5.
| Number | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| Probability | 0.15 | 0.25 | 0.1 | 0.2 |
The spinner is spun 300 times.
Work out an estimate for the number of times the spinner will land on 1 or on 3.
128 exam-style questions on Edexcel GCSE Maths Probability. Each one has a worked solution and a mark scheme showing where the marks go.