Re: In how many ways can 5 persons be seated around a circular
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08 Aug 2021, 10:18
Circular arrangement concept! Why it's really (n-1) factorial?
circular table having 5 seats, we have 5 people to occupy.
The first guy has no unique positions in a circle all 5 are the same to him, once the first guy is filled in circular arrangement, with him being the reference point we have 4 unique positions for others hence (n-1) !
what about the rectangular table? the first guy has 3 positions(assuming 6 total sitting positions 2 along sidelength and 1 each along the width), once the first guy occupies anyone then Normal arrangement begins.