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Omni-MATH / There are six empty slots corresponding to the digits of a six-digit number.…

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problem

There are six empty slots corresponding to the digits of a six-digit number. Claire and William take turns rolling a standard six-sided die, with Claire going first. They alternate with each roll until they have each rolled three times. After a player rolls, they place the number from their die roll into a remaining empty slot of their choice. Claire wins if the resulting six-digit number is divisible by 6, and William wins otherwise. If both players play optimally, compute the probability that Claire wins.

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