Visual proofs of some series. Not 100% related to probability but neat nonetheless. For example, check out the illustration of 1 + 2 + 3 + ... + n = n * (n+1) / 2
Very cool. Now that we see that mail filter software "adapts" to the user, we can address the problem in class of what would happen if a doctor who deals with prostate issues uses a filter and words such as viagra prop up when the email is not actually spam.
Overview of the history, philosophy, and basic operations in set theory. Fortunately, sets are an extremely flexible way to describe mathematical objects, such as the sample space of some experiment. To our disappointment, it turns out to not be the be-all, end-all of mathematics, but that's a subject for a logic course.
There are at least 3 conditional probabilities problems embedded in the article (it doesn't look like there are specific enough numbers to solve them precisely though).