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AMC 10 2020b Problem 11

  • Paper

Ms. Carr asks her students to read any 55 of the 1010 books on a reading list. Harold randomly selects 55 books from this list, and Betty does the same. What is the probability that there are exactly 22 books that they both select? (A) 18(B) 536(C) 1445(D) 2563(E) 12\textbf{(A)}\ \frac{1}{8} \textbf{(B)}\ \frac{5}{36} \textbf{(C)}\ \frac{14}{45} \textbf{(D)}\ \frac{25}{63} \textbf{(E)}\ \frac{1}{2}

Dataset text NuminaMath-1.5. Quoted with source.

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\frac{25}{63}

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