Even better, use `\text`, which re-sizes properly.
[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.
Great, we have arrived at the conditional probability of red given yellow!
...should have "red" and "yellow" switched. It's kind of confusing otherwise.
