AQuA-RAT train #53065 · Combinatorics · Permutations & combinations

12 different biology books and 8 different chemistry books lie on a…

12 different biology books and 8 different chemistry books lie on a shelf. In how many ways can a student pick 2 books of each type?

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #53065

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