수학동아 - 폴리매스

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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] 학문 회의[조합]

우럭 2020.07.14 18:59 조회 486

문제 푼 사람 0명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

어느 학문 회의에 2020명이 참가했다.

모든 사람은 많아야 5개의 학문을 알고 있고,

무작위로 3명을 골라도 그 중 적어도 2명은 같은 학문을 알고 있다고 할 때,

참가자들 중 적어도 몇 명이 같은 언어를 알고 있는가?

이전글 해석1-1

다음글 [물리]생각보다 까다로운 문제(1)

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