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Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] [확률] 정말 오랜만에 폭행된 쿠파주니어
관종이
2020.04.30 22:28
조회 552
앞의 문제와 연결되는 문제입니다.
파티의 기운이 무르익을 때 쯤에 비명소리가 들리고 곧 암전이 되었고, 다시 불이 켜지자 쿠파주니어가 머리에 피를 흘리며 쓰러져 있다.
사건 현장에 찾아온 명탐정 피카츄와 코난은 사건 현장을 분석하기 시작했다.
피카츄가 용의자들에게 일일이 범인이냐고 물어보았다.
마리오, 루이지, 피치, 데이지, 요시, 쿠파, 로젤리나 중에서 한 명이 범인이다.
범인이 자백을 할 확률은 1/6, 부인을 확률이 5/6 이다.
범인이 아닌 나머지 사람이 자백을 할 확률은 1/10 이고, 부인을 할 확률은 9/10 이다.
피카츄가 증언을 분서하고, 99.9%의 확률로 진실이나 거짓을 판별한다.
1. 범인이 아닌 사람이 억울하게 체포되는 확률은?
2. 범인이 체포되지 않을 확률은?
단, 아버지가 아들을 폭행할 수 있다.
지금 바로
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