I wanted to find the odds of losing x games out of a sample of n games recently, and couldn't find the answer on google. This lead me to calculating it myself.
Where P is the probability of losing a game (55% would be 0.55).
You can do stuff like calculate the odds of losing 18 out of 25 games fairly easily. If you want to know the odds of losing 18 or more games, you'd have to sum the result of 18+19+...+25, which you could in wolfram alpha.
Well I knew about the combinatorial function, I didn't know about the PMF function (which is precisely the one above). Still, getting to a well known result basically by yourself is always nice