[HN Gopher] Creating fair dice from random objects
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       Creating fair dice from random objects
        
       Author : epipolar
       Score  : 16 points
       Date   : 2025-06-28 06:11 UTC (2 days ago)
        
 (HTM) web link (arstechnica.com)
 (TXT) w3m dump (arstechnica.com)
        
       | gametorch wrote:
       | the title is a classic quant interview problem
       | 
       | the basic idea is that, because multiplication commutes,
       | probability of A then B is the same as probability of B then A,
       | so long as they are independent events (rolling objects typically
       | meets this criteria)
       | 
       | so instead of using just A or just B, which might neither have
       | 0.5 probability, you only count "A then B" and "B then A" as
       | rolls
       | 
       | and this trivially extends to constructing a fair N-sided die out
       | of any arbitrarily biased die for any N
        
       | pixelpoet wrote:
       | Hey hey, it's Keenan Crane again :)
        
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       (page generated 2025-06-30 23:00 UTC)