| [ QuizWit ] in KIDS 글 쓴 이(By): guest (sol) <schroeder.kaist.> 날 짜 (Date): 2001년 9월 27일 목요일 오후 09시 29분 35초 제 목(Title): counting puzzle What is the number of circular arrangements of m white balls and n black balls? I think this question about for a week. But I don't know the answer now. |