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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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Function: model
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Line: 559
Function: get_footer
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Line: 315
Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
원파
2021.01.23 09:12
조회 445
호그와트 3학년생 원파는 마법의 역사 시험을 봅니다.
마법의 역사는 시험지로 시험을 봅니다.
각 문제는 1~5까지 중 단 하나를 고르는 식입니다.
문제는 X개 있습니다.
공부를 소홀히 한 원파는 전부 무작위로 찍거나, X개 모두 답 하나로 찍으려고 합니다.
어느 쪽이 평균적으로 문제를 더 많이 맞거나, 아니면 두가지 모두 같을까요?
그리고, 각각의 방법으로 문제를 풀 때, 맞을 수 있는 문제의 개수의 기댓값을 구하세요.
마지막으로, 문제가 OX 문제일 경우에 대한 답도 구하세요.
-
호박고구마
Lv.7
2021.01.25 07:09
비밀댓글
비밀 댓글이 등록 되었습니다.
-
NimNim
Lv.9
2021.02.28 08:36
비밀댓글
비밀 댓글이 등록 되었습니다.
지금 바로
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