Mathematics, 21.07.2021 16:50 anggelkevin100

Thang máy của một khách sạn 10 tầng. Có 5 khách xuất phát từ tầng 1 đi lên các tầng trên. Hỏi có bao nhiêu trường hợp để:
Mỗi người ra ở 1 tầng khác nhau

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Thang máy của một khách sạn 10 tầng. Có 5 khách xuất phát từ tầng 1 đi lên các tầng trên. Hỏi có ba...

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