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수학동아 - 폴리매스
함께 풀고 싶은 문제
나도 수학쌤 문장제 문제를 변형해 문제를 내는 곳입니다.
[문장제 문제&개념응용] [대수][확률] 유성우 축제
17수락
2020.12.08 08:57
조회 343
2020년 12월 8일 오전 00시 01분 45.678초, 대한민국의 모든 행정구역에 유성우가 떨어진다고 한다
유성우의 개수는 각 지역마다 다르다(행정구역은 서울,부산,제주도,경기도 등을 뜻함)
어떤 행정구역의 있는 모든 시 의 개수를 n이라 하면
30% 확률로 (n+1)(n-1)개의 유성우가 각 행정구역에 분배되어 떨어지고
50% 확률로 (n+3)^2 개의 유성우가 각 행정구역에 분배되어 떨어지고
5%확률로 (n-6)^2개의 유성우가 각 행정구역에 분배되어 떨어지고
15%확률로 (n+8)(n+2)개의 유성우가 각 행정구역에 분배되어 떨어진다
나는 경기도에 살 확률이 34%, 강원도에 살 확률이 26%, 제주도에 살 확률이 20%, 서울에 살 확률이 20%일때,
내가 유성우에 맞을 확률은?(단, 유성우 1개당 최소 5%의 시민, 최대 10% 시민을 죽인다)(단 개수대로 비례해서)
지금 바로
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