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[문장제 문제&개념응용] 최고의 궁합(답 구하고 있습니다)
17수락 2021.12.10 05:48 조회 344
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

3명의 친구가 있다

위처럼 5개의 방이 3줄 있다

3명의 친구는 각 줄마다 한 방에 들어갈 수 있으며, 다음 방으로 옮길 때는 위 그림처럼 앞에있는 방과 그 양옆에 있는 방으로만 갈 수 있다(첫 줄에서 선택하는 것은 무작위이다)

그렇다면 마지막에 세 친구가 같은 방에 있을 확률은 얼마인가?

 

 

답 구하고 있습니다

이 문제 어떠셨나요?

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  •  
    Amath Lv.8 2021.12.11 04:17

    처음에 같은 방에 들어가도 되는 거죠?

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    •  
      17수락 Lv.9 2021.12.12 09:15

      네

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  •  
    △π Lv.9 2021.12.12 08:50

    마지막의 정의가 무엇인가요 

    몇 회 시행해야 마지막이라 하나요?

    아니면 세 친구는 같은 방에 들어갈 때까지 무한히 시행을 반복하나요?

    댓글 작성하기 좋아요0 댓글수1
    •  
      17수락 Lv.9 2021.12.12 09:14

      그림을 보세요

      3번째가 마지막이네요

       

      좋아요0
  •  
    17수락 Lv.9 2021.12.12 09:15

    어 이게 왜 세바문에 올라왔지......

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  •  
    켋 Lv.7 2021.12.13 02:05 비밀댓글
    확인요청중

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