Lemma
MediumPermutations & combinations
AQuA-RAT train #60933 · Combinatorics · Permutations & combinations

Nine students - 4 boys and 5 girls - are to sit…

Nine students - 4 boys and 5 girls - are to sit side by side for a makeup exam. How many ways could they arrange themselves given that no two boys and no two girls can sit next to one another?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #60933

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