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Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Line: 22
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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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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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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Function: initMenu
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Line: 799
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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/controllers/ver3/Contents.php
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Line: 18
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Line: 315
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Line: 19
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 322
Function: model
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
Line: 392
Function: getFloatingMyInfo
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 559
Function: get_footer
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
17수락
2020.09.03 05:25
조회 393
어느 마을이 폭발했다
이 마을에는 500명이 살았다
이500명 중 150명은 아주 건강했다.
100명은 건강하고 50명은 보통이다.
100명은 약하고 100명은 허약체질이다
아주 건강한 사람들: 부상 없이 살아남을 확률 40%, 부상을 입고 살아남을 확률 30%, 사망할 확률 30%다
건강한 사람들: 부상 없이 살아남을 확률 30%, 부상을 입고 살아남을 확률 40%, 사망할 확률 30%다
보통은 건강한 사람들과 거의 같지만 부상을 입고 살아남을 확률이 5%높고, 부상없이 살아남을 확률이 5%낮다
약한 사람들은 부상 없이 살아남을 확률 20%, 부상을 입고 살아남을 확률 45%, 사망할 확률 35%다
마지막으로 허약체질 사람들은 부상을 무조건 입는다. 살아남을 확률 50%에 사망할 확률 50%다
이 마을 사람들중 390명이 살아남을 확률은 얼마인가?
지금 바로
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