Lemma
MediumPermutations & combinations
AQuA-RAT train #50332 · Combinatorics · Permutations & combinations

Five friends go to a city where they can stay in 10…

Five friends go to a city where they can stay in 10 different hotels. In how many ways can they stay in these hotels if at least two of them stay together?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #50332

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