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    Except the allowable outcomes aren't equally likely then; e.g., there are two ways to get 1230, but only one way to get 1234. Commented Apr 24, 2017 at 16:36
  • @TimPeters you're right. Added an alternate solution. Commented Apr 24, 2017 at 16:40
  • if you get 0023, then you have the same problem Commented Apr 24, 2017 at 16:41
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    but you cannot have 0023. There's only one 0 Commented Apr 24, 2017 at 17:05