"We went over the student's homework on probability distributions, binomial distributions, Poisson distributions, and geometric distributions. The most important thing to remember for this chapter is that geometric distributions should be used when you are looking for the probability of getting the first success, and Poisson should be used when you have the mean. Binomial should be used when we are looking at the number of successes overall. Cumulative probabilities are relevant when the question includes words such as "at most," "at least," "less than," or "more than.""