3. In an exam with 30 students,1 student has made 13 mistakes and a othe students have made fewer mistakes. Prove that at least 3 students have made the same number of mistakes Show transcribed image text 3. In an exam with 30 students,1 student has made 13 mistakes and a othe students have made fewer mistakes. Prove that at least 3 students have made the same number of mistakes
Answer
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