Lemma
MediumPermutations & combinations
AQuA-RAT dev #220 · Combinatorics · Permutations & combinations

A bakery has 4 varieties of pastries

A bakery has 4 varieties of pastries. Each variety is having many number of pastry. I want to purchase of 10 pastries such that I get to taste each variety. How many ways to purchase?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · dev #220

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