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Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: initiateCache
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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: 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
나도 수학쌤 문장제 문제를 변형해 문제를 내는 곳입니다.
[문장제 문제&개념응용] [확률] 오로라의 주기
17수락
2020.11.17 07:00
조회 338
수락은 오로라를 관찰하고 있다
관찰 결과:
| |
주기 |
위치 |
위험도 |
존재하는 시간 |
| 확률 20% |
10일에 1번 |
아시아 |
1분에 3명이상 5명이하 사망
|
20분 |
| 확률 21% |
4일에 1번 |
오세아니아 |
1분에 7명 이하 사망 |
1시간 11분 |
| 확률 43% |
20일에 1번 |
유럽(북아메리카 포함) |
40초에 20명 이하 사망 |
3분 |
| 확률 16% |
2일에 1번 |
남아메리카&아프리카 |
3분에 5명 사망 |
59분 |
이럴때, 오로라로 오세아니아에서 1달동안 몇명 이상이 죽어야 그 몇명 이하의 확률로 25분 이상으로 오로라가 존재할까?
정말 꼬는 문제(머리가 터지실수도 있으니 임산부와 노약자는 이 글을 읽으시는것을 삼가 드립니다(미리 말했어야지!))
지금 바로
로그인해보세요
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