[1] http://bayes.wustl.edu/etj/prob/book.pdf
[2] http://blog.moertel.com/posts/2010-12-20-more-on-the-evidenc...
This a very good 4 part series on the subject, with a focus (esp. in part 3) on how this affects scientific statements.
Even better, use `\text`, which re-sizes properly.
Great, we have arrived at the conditional probability of red given yellow!
...should have "red" and "yellow" switched. It's kind of confusing otherwise.