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.. so if the dice are rolled enough times and graphed, the graft will conform to a bell curve, if the dice aren't loaded.
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I believe you will *not* get a bell curve but rather a flat line assuming the dice face's (1 to 6) are plotted along the horizontal and the number of occurances are plotted on the vertical. All numbers will occur a roughly equal number of times over a sufficiently large number of trials. A bell curve would indicate the dice is weighted. Please call me as soon as you find this situation so that I can bet with you!