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Function: driver

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Function: model

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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
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함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] 고양이
GUN.007 2019.12.05 08:47 조회 789
문제 푼 사람 1명
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

저한테는 올 수 있는 고양인지 강아진지가 1000마리 있습니다. 고양이로 하겠습니다. 한 고양이마다 1부터 1ㅇ00까지 중 하나의 번호를 가지고 번호는 겹치지 않습니다.

저한테 고양이가 한 번에 한 마리만 올 때 제가 120이라는 고양이를 만나고 싶을 때 고양이를 120번 만나면 120번 고양이를 만날 확률은 얼마나 될까요?

단, 왔던 고양이도 또 볼 수도 있습니다

풀이도 적어주세요!

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