Question

There are `30` students in a class. During a test, Pinchas made `13` mistakes, and the rest made fewer mistakes. Prove that there are three students who made the same number of mistakes.

Difficulty level (1 very easy - 10 very hard): 3

Topics:
Combinatorics -> Pigeonhole Principle Logic -> Reasoning / Logic Proof and Example -> Proof by Contradiction Minimum and Maximum Problems / Optimization Problems
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