Lemma
MediumPermutations & combinations
AQuA-RAT train #10581 · Combinatorics · Permutations & combinations

Five persons enter the lift of a seven storey building at the…

Five persons enter the lift of a seven storey building at the ground floor. In how many ways can they get out of lift on any floor other than ground floor

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #10581

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