HMMT November 2009 T11
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- Answer
In general, if there are doors in every room (but still only 1 correct door) and rooms, the last of which leads into Bowser's level, what is the expected number of doors through which Mario will pass before he reaches Bowser's level?
Dataset text NuminaMath olympiads. Quoted with source.
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\frac{d\left(d^{r}-1\right)}{d-1}
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