I am no math guy. I can count enough to put the right number of candles on my birthday cake, but not much else. This doesn’t usually worry me when it comes to game design, because I am more of a “it feels right” kind of guy, rather than a hard probabilty guy. This has served me well enough (so far). Some games (and game designers), though, like the mathamatical stuff you can do with dice probability. And if you are designing for an existing game, you probably need to understand how the probabilities work in that system. There has been a fair bit of discussion on my own game, FU, over at the FU yahoo group about alternative dice mechanics, probabilities and the like. It has all been very interesting (if I do say so myself). If you are interested in that discussion you should check out the yahoo group. If you are interested in dice probabilities, have a look at the AnyDice website.