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Function: driver
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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
함께 풀고 싶은 문제
나도 수학쌤 문장제 문제를 변형해 문제를 내는 곳입니다.
[문장제 문제&개념응용] [확률] 녹아내리는 눈사람
17수락
2020.11.29 05:45
조회 388
수락은 힘겹게 50일동안 거대 눈사람을 하나 만들었다
그 눈사람은 구 3개가 쌓아져있는 구조로 구성되어 있다
그 구의 닮음비가 2;4;5일 확률은 40%
6;7;11일 확률은 30%~60%,
5:9:13일 확률은 0%~30%이다
그리고 하루에 빛이 1% 쬐어질 때마다 눈사람은 전체의 1%씩 녹는다
하루에 빛은 0%~3%까지 쬐어진다고 할때,
수락의 눈사람의 첫번째 구가 녹는 날과 두번째 구가 녹는 날의 차의 확률이 30%이상일 확률을 구하여라
지금 바로
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