AMC 12 2009b Problem 21
- Paper
Ten women sit in seats in a line. All of the get up and then reseat themselves using all seats, each sitting in the seat she was in before or a seat next to the one she occupied before. In how many ways can the women be reseated?
\textbf{(A)}\ 89 \textbf{(B)}\ 90 \textbf{(C)}\ 120 \textbf{(D)}\ 2^{10} \textbf{(E)}\ 2^2 3^8
Dataset text AMC 12 2000 to 2025. Quoted with source.
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A
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