I have a probability question I was hoping someone could help me out with. We've started a Call of Cthulhu campaign. In our gaming group, one of the members reads percentile dice strangely:
My interpretation of results:
00 Die | 0 Die | Result |
---|---|---|
00 | 1 | 01 |
30 | 7 | 37 |
20 | 0 | 20 |
00 | 0 | 100 |
His interpretation of results:
00 Die | 0 Die | Result |
---|---|---|
00 | 1 | 01 |
30 | 7 | 37 |
20 | 0 | 30 |
00 | 0 | 10 |
Basically he always treats a 0 on the ones column die as ten. So if you roll a 90 on the tens, and a 0 on the ones that becomes 90+10=100.
I can't find fault with the method as it also produces a result of 1-100, but it is adverse to every rule system I've seen. My question is, does this change the curve of probability based on the number positioning on the die. With the traditional method, 99% of the time the ones digit die represents and resides between the 8 and 4 sides of the dice. With this alternate method it is 100% of the time counted as a 10. I believe that the difference is negligible, but I am unsure as how to prove it.
Thoughts?
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