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MathNet 2021 — Part 05 Question 11

Math Olympiad Vault · MathNet 2021 — Part 05

Question 11

A tournament among $2021$ ranked teams is played over $2020$ rounds. In each round, two teams are selected uniformly at random among all remaining teams to play against each other. The better ranked team always wins, and the worse ranked team is eliminated. Let $p$ be the probability that the second best ranked team is eliminated in the last round. Compute $\lfloor 2021 p \rfloor$.