관종이는 몰컴을 하고 있다.
관종이 옆에는 인공 눈물 통이 있다.
이 통 안에 5개의 봉지가 있고,
한 봉지당 인공눈물 통이 10개씩 있다.
이 통는 1부터 50까지의 수가 쓰여 있고, 랜덤적으로 아무런 봉지에 들어가 있다.
관종이가 한 개의 봉지를 골라 뜯었을때,
그 봉지 안에, 2,5,6,17번 인공눈물 통이 있을 확률은?
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해결
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