The table shows the travel method used by 120 employees.
| Car | Bus | Walk | Total | |
|---|---|---|---|---|
| Full-time | 42 | 18 | 12 | 72 |
| Part-time | 18 | 21 | 9 | 48 |
| Total | 60 | 39 | 21 | 120 |
Find P(bus∣part-time)P(\text{bus}\mid\text{part-time})P(bus∣part-time).
Find P(part-time∣bus)P(\text{part-time}\mid\text{bus})P(part-time∣bus).
Determine whether being part-time and travelling by bus are independent.
164 exam-style questions on WJEC A Level Maths 4.1 Probability (A-level only), covering 4.1.1 Probability (A-level only), 4.1.2 Probability (A-level only), and 4.1.3 Probability (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.