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[문장제 문제&개념응용] 구슬뽑기
잡담 2022.07.18 01:14 조회 176
문제 푼 사람 1명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

창이, 이파, 타르는 편의점에 갔다. 편의점에서 각자 라면을 한개씩 사먹으려고 하는데 각자 돈을 내는게 아니라 한명만 돈을 내는 거다. 그래서 밥 사줄 사람을 정하는 게임을 하기로 했다. 규칙은 이렇다:

 

주머니 속에 흰구슬 2개, 검은 구슬6개가 들어 있다. 타르, 이파, 창이 순서대로 한번씩 주머니에서 구슬을 1개씩 꺼내고 제일 먼저 흰 구슬을 꺼내게 되는 사람이 이긴다. 꺼낸 구슬은 코로나 때문에 다시 넣지 않고 버린다.

 

이때, 창이가 이길 확률은?

이 문제 어떠셨나요?

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  •  
    잡담 Lv.7 2022.07.18 01:14 비밀댓글
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  •  
    잡담 Lv.7 2022.07.18 01:19

    참고로 이기는 사람이 밥사는 겁니다. (문제 풀때 필요한 내용은 아니겠지만)

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    다시 도전
    사고력 Lv.5 2022.07.18 02:44 비밀댓글

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    부분해결
    khr519 Lv.8 2022.07.19 01:43 비밀댓글

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

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    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 201
    Function: is_dir

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    Line: 236
    Function: getLatexImg

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    Line: 90
    Function: parseLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
    Line: 343
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    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
    Line: 202
    Function: mkdir

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    Line: 236
    Function: getLatexImg

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    Line: 90
    Function: parseLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
    Line: 343
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    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
    Line: 212
    Function: file_exists

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    Line: 236
    Function: getLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
    Line: 90
    Function: parseLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
    Line: 343
    Function: view

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

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    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 213
    Function: file_get_contents

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    Line: 236
    Function: getLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
    Line: 90
    Function: parseLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
    Line: 343
    Function: view

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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    Line: 315
    Function: require_once

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    Filename: libraries/Common.php

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    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 213
    Function: file_put_contents

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 236
    Function: getLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
    Line: 90
    Function: parseLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
    Line: 343
    Function: view

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
    Line: 558
    Function: view

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

    A PHP Error was encountered

    Severity: Warning

    Message: file_put_contents(/DATA/upload/polymath/latex/c96c9564df22c0362b7ce96526c73f40.gif): Failed to open stream: Operation not permitted

    Filename: libraries/Common.php

    Line Number: 213

    Backtrace:

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 213
    Function: file_put_contents

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
    Line: 236
    Function: getLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view_comment_list.php
    Line: 90
    Function: parseLatexImg

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/views/ver3/inc/view.php
    Line: 343
    Function: view

    File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
    Line: 558
    Function: view

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

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    해결
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    다시 도전
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