수학동아 - 폴리매스

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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] 돌떨어뜨리기

K→C≡N 2020.03.26 21:33 조회 475

문제 푼 사람 0명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

<기자님들께> 앞으로 제 문제는 수학동아에 절대 올리지 말아주세요!

5*5*5 상자가 있다.

1*1*1짜리 돌을 80개 떨어뜨려서 1~4층에 20개씩 떨어질 확률은?

단, 돌은 상자의 면과 자신의 면을 평행하거나 수직하게만 떨어진다.

이전글 영어 문제5

다음글 G3이 바뀔 확률

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