How many three-element subsets of {1,2,3,4} are there that do not contain…

How many three-element subsets of {1,2,3,4} are there that do not contain the pair of elements 2 and 4?

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 #6119

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