Traditional Culture Encyclopedia - Hotel franchise - Five people checked into the hotel.
Five people checked into the hotel.
3xC(52)xC(32)+3xC(53)xC(2 1)-3xC(42)xC(2 1)= 1 14
22 1 and 3 1 1, and finally subtract the number of ab species in a group. (ab in Group A can be said to be Group F, that is, cdef4 people live in 3 rooms, and each room has at least 1 person, and there is no other requirement).
Don't thank me. I'm Lei Feng.
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