Lemma
MediumPermutations & combinations
AQuA-RAT train #22828 · Combinatorics · Permutations & combinations

The average age of 10 members of a committee is the same…

The average age of 10 members of a committee is the same as it was 4 years ago, because an old member has been replaced by a young member. Find how much younger is the new member ?

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 #22828

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