Lemma
MediumCounting & chance
AQuA-RAT train #57101 · Probability · Counting & chance

A group of n people, including Caroline and her best friend Catherine…

A group of n people, including Caroline and her best friend Catherine, stand in random order around a circle, with each order being equally likely. If the probability that Catherine is adjacent to Caroline is 1/9 , then what is the value of n?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #57101

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