Summary
If X ~ Po(λ), then P(X = r) = e-λ λx / x!
Examples of Poisson Distributions:
No. of TV sets sold per day
No. of patients seen by a doctor per day
No. of phone calls per day
No. of road accidents per week
No. of letters received per week
No. of plane crashes per year
No. of earthquakes per year
No. of flaws in a roll of wallpaper
No. of gold coins found per square metre