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AMC 12 2010b Problem 16

  • Paper

Positive integers aa, bb, and cc are randomly and independently selected with replacement from the set {1,2,3,…,2010}\{1, 2, 3,\dots, 2010\}. What is the probability that abc+ab+aabc + ab + a is divisible by 33?

\textbf{(A)}\ \dfrac{1}{3} \textbf{(B)}\ \dfrac{29}{81} \textbf{(C)}\ \dfrac{31}{81} \textbf{(D)}\ \dfrac{11}{27} \textbf{(E)}\ \dfrac{13}{27}

Dataset text AMC 12 2000 to 2025. Quoted with source.

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E

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