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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: driver

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: initiateCache

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: _error_handler

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Function: model

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Function: initMenu

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Function: getComment

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Function: _error_handler

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: require_once

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Function: _error_handler

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Line: 559
Function: get_footer

File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once

수학동아 - 폴리매스
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함께 풀고 싶은 문제
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[창의 퍼즐] 상자와 공
아인수타인 2020.03.26 04:38 조회 492
문제 푼 사람 1명
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

겉으로는 완전히 똑같은 상자 A,B가 있다. 상자 A에는 빨간 공 4개와 파란 공 2개가, 상자 B에는 빨간 공 2개와 파란 공 4개가 들어 있다. 이제 페루마가 동전을 던져 앞면이 나오면 왼쪽, 뒷면이 나오면 오른쪽 상자를 고른다(단, 어느 쪽 상자가 무슨 상자인진 모른다). 그리고 공을 하나 꺼낸다. 페루마가 공을 꺼냈더니 파란 공이 나왔다. 그러면 패루마가 고른 상자가 A였을 확률은?

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    해결
    Turgon Lv.6 2020.03.26 06:09 비밀댓글
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    켋 Lv.7 2020.03.27 23:27 비밀댓글
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