Lemma
MediumPermutations & combinations
AQuA-RAT train #24469 · Combinatorics · Permutations & combinations

Tim and Stacy need to select seats in a row of chairs…

Tim and Stacy need to select seats in a row of chairs that are numbered in order from 1 to 5. If Tim cannot sit in an even-numbered seat and Stacy cannot sit in an odd-numbered seat, how many arrangements are possible if the two cannot sit adjacent to each other and Tim and Stacy are the only people to be seated?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #24469

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