1) The document calculates probabilities of death from various causes like car accidents, drunk driving accidents, airplane accidents, bicycle accidents, motorcycle accidents, bus accidents, and combinations of accidents by taking the population of the US and dividing it by the number of deaths from each cause.
2) It finds that the probability of dying from a car accident is about 1 in 20,000, from a drunk driving accident is about 1 in 43,000, from an airplane accident is about 1 in 500,000, and from a bicycle accident is about 1 in 70,000.
3) It also determines the probability of not dying from each cause by subtracting the probability of dying from 1.