Lemma
MediumPermutations & combinations
AQuA-RAT train #7939 · Combinatorics · Permutations & combinations

The average age 20 members of a committee are the same as…

The average age 20 members of a committee are the same as it was 2 years ago, because an old number has been replaced by a younger number. Find how much younger is the new member than the old number?

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AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #7939

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