AMC 10 2016a Problem 1

What is the value of $\dfrac{11!-10!}{9!}$ ? $\textbf{(A)}\ 99 \textbf{(B)}\ 100 \textbf{(C)}\ 110 \textbf{(D)}\ 121 \textbf{(E)}\ 132$

Dataset text AI-MO AoPS. Quoted with source.

Solutions

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