Well gmabling seems kind of... broken. You have a 1/6 chance of winning an item, then a 5/12 chance of winning double your money and 5/12 chance of losing. So effectively unless you are really poor or unlucky you can just keep playing till you get a chill and end up with loads of stuff.
I thought it was a 6/12 of losing, a 1/12 of winning an item, and then 5/12 of winning money. Seems like it's still in the house's favor to me.
Anyway, I finally got to experiment with that blood crown. It was pretty sweet. Free health forever!
Your probabilities are way, way off.
When rolling two dice, for one thing, there aren't even 12 possible totals you can get. They range from 2 to 12, so that makes 11.
Also, some combinations are obviously more common than others. In fact, the most probable outcome you get from rolling two dice IS a 7.
Here's a chart:
http://wizardofodds.com/gambling/dice.htmlYour odds of rolling a 7 on two dice is actually 6/36, or 1/6, or about 16.7%.
The probability of rolling higher than 7 turns out to be the same as the probability of you rolling lower than 7, so you're still equally likely to lose money as you are to make money, but overall, your probability of "winning" (either getting an item or getting double your money back) is more like 58.3%.
To break it down, you have a 15/36 chance of losing your money, a 15/36 chance of getting double your money back, and a 6/36 chance of getting an item.
The reason your probabilities were so off is because you were interpreting it as if you were rolling a single 1-12 die, in which case you would have been right.