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MediumPermutations & combinations
AQuA-RAT train #17848 · Combinatorics · Permutations & combinations

A test of 10 questions is chosen from 10 hard questions and…

A test of 10 questions is chosen from 10 hard questions and 20 easy questions. The salad must have at least 4 hard questions at least 3 easy questions. How many ways can this test be created?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #17848

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