Lemma
MediumPermutations & combinations
AQuA-RAT train #72516 · Combinatorics · Permutations & combinations

In how many different ways can 4 physics, 2 math and 3…

In how many different ways can 4 physics, 2 math and 3 chemistry books be arranged in a row so that all books of the same branch are together?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #72516

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