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함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] [조합]파티속의 우연
MathlabJ 2020.06.01 01:57 조회 660
문제 푼 사람 2명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

코로나 사태가 모두 끝난 2020년 12월, 사람들은 축하파티를 하기 위해 한자리에 모였다.

 

파티에 참석한 사람들은 웃고 떠들며 좋은 시간을 보냈다.

 

대화 도중 파티에 참석한 A는 B라는 사람이 자신과 생일이 같다는 것을 알게 되었다.

 

다음은 A와 B의 대화중 일부이다.

 

A: 우와! 우리 둘의 생일이 같군요. 이거 대단한 우연이네요.

 

B: 제가 보기에는 아니에요. 이정도로 많은 사람들이 참석한 파티에서 적어도 두 사람의 생일이 같을 확률은 50%가 넘어요.

 

이때, 파티에 참석한 총 인원수는 최소 몇명일까?

 

풀이과정과 답을 구하여라.

이 문제 어떠셨나요?

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    아인수타인 Lv.12 2020.06.01 03:58 비밀댓글

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    Function: require_once

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    해결
    222 Lv.9 2020.06.01 04:30 비밀댓글
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  •  
    아인수타인 Lv.12 2020.07.01 07:09

    12월에 코로나 사태가 끝나긴 할까요? 제 생각엔 겁나 빠르면 내년 3월쯤에 끝날 거 같은데

    댓글 작성하기 좋아요0 댓글수1
    •  
      Yunite Lv.6 2020.07.01 07:12

      음..그렇게요

      좋아요0

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