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Function: model

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Function: getFloatingMyInfo

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Function: get_footer

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Function: require_once

수학동아 - 폴리매스
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함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] 발사[확률] 난이도:OOOOOO,노가다 40%
khr519 2020.07.14 01:27 조회 623
문제 푼 사람 0명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

대포가 50대 있고

포탄이 300개 있다

각각 불량품이 3개와 65개 있고

대포가 불량일때는 대포가 폭발하고(이래도 목표는 맟춤)

포탄이 불량일 때는 목표물을 맟추지 못한다

대포 47대에 포탄 235개를 여러번으로 나누어 넣고 발사했을때

"불량품이 하나도 나오지 않을 확률" 과 "첫 발사에 불량 대포가 몽땅 나올 확률" , "첫 발사에 목표물을 하나도 맟추지 못할 확률" 을 차례로 구하시오

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