AQuA-RAT train #89015 · Combinatorics · Permutations & combinations
From a bunch of eight keys, three particular keys have to be…
From a bunch of eight keys, three particular keys have to be used to open a combination lock, such that the second key can be used only after the first key and the third key can be used only after the second key. What are the chances of opening the lock in a random selection of three keys?
AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #89015
Stuck? A gentle nudge
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