Calculating the probability of two dice getting at least a $1$ or a $5$ So you have $2$ dice and you want to get at least a $1$ or a $5$ (on the dice not added).  How do you go about calculating the answer for this question.
This question comes from the game farkle.

The other way to visualise this would be to draw a probability tree like so:
alt text http://img.skitch.com/20100721-xwruwx7qnntx1pjmkjq8gxpifs.gif
(apologies for my poor standard of drawing :) )
