RU-ALLRUSSIAN 1991 Problem 4
- Answer
A lottery ticket has 50 cells into which one must put a permutation of 1, 2, 3, ..., 50. Any ticket with at least one cell matching the winning permutation wins a prize. How many tickets are needed to be sure of winning a prize?
Answer 26
Dataset text NuminaMath olympiads. Quoted with source.
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26
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