Yukon College course MATH 105 (Intro Stats) blackboards

1. One way to get X heads out of n flips is to get them all in a row. We can multiply together the probabilities of these independent events. But we can get X heads out of n flips in a lot of different orders, which is given by the combination.

2. Voila … the Binomial Distribution formula.

7. A Poisson problem