2. Accidents on a particular stretch of motorway occur at an average rate of 1.5 per week.
- Write down a suitable model to represent the number of accidents per week on this stretch of motorway.
Find the probability that
- there will be 2 accidents in the same week,
- there is at least one accident per week for 3 consecutive weeks,
- there are more than 4 accidents in a 2 week period.