I was asked by a colleague to work out some probabilities (its been a good 20+ years since I have done any real probabilities mind), and I have worked out some but I know they are wrong I just can't fathom why.
We have X Dice, with Y Sides, and its possible two or more sides can have the the symbol (so these dice aren't simple 1-6 D6's).
So for example
Dice 1 (D8) = A A B B B C D
I need to work out combination of using multiple dice from various symbol layouts can effect the results of getting a "A" for example or getting two "A"'s.
Not to bad, the problem is if some dice "negate" other results, i.e.
Dice A (D8) = -A -A -AA B B B C D
As in two sides negate an A and one side negates one or two A's.
This is where my probabilities skills have become to rusty for me to work out, help would be much appreciated! (especially as we are dealing up with pools of 20+ dice with various (6+) variations on symbols)