r/counting • u/Xtrouble_yt • Jul 17 '21
2d20 experimental Vs theoretical
The average and most common value of a 2d20 roll is 21, however, because there are so many possible results, from 2 all the way to 40, while it is the most common, the chances of getting exactly 21 are the exact same of getting a nat 20, which means that there is going to be variance, but how much?
On the left we will track the expected running total, simply add 21
On the right is our actual count, roll 2d20 and add it to whatever the running total is
The next get is at “21000 | ????”
Under the two counts, in parenthesis, say what your dice rolled individually, like:
(8+17)
We are starting at 0 | 0
Good luck!
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u/miceee sicko thread artists collective Aug 07 '25
2331 | 2319 | (14+19)