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AMC 12 2010b Problem 17

  • Paper

The entries in a 3×33 \times 3 array include all the digits from 11 through 99, arranged so that the entries in every row and column are in increasing order. How many such arrays are there?

\textbf{(A)}\ 18 \textbf{(B)}\ 24 \textbf{(C)}\ 36 \textbf{(D)}\ 42 \textbf{(E)}\ 60

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

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D

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