Lemma
MediumPermutations & combinations
AQuA-RAT train #9930 · Combinatorics · Permutations & combinations

A pizza shop made pizzas with many flavours

A pizza shop made pizzas with many flavours. There are 9 different flavours, in that 2 flavours are taken to make pizza. In how many ways they can arrange?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #9930

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