AQuA-RAT train #87693 · Combinatorics · Permutations & combinations
There are 9color balls at a row
There are 9color balls at a row. From that how many ways can 9 different color balls be arranged in a row so that black, white, red and green are never together?
AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #87693
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