JAMB - Mathematics (2011 - No. 41)
In how many ways can five people sit round a circular table?
24
60
12
120
คำอธิบาย
The first person will sit down and the remaining will join.
i.e. (n - 1)!
= (5 - 1)! = 4!
= 24 ways
i.e. (n - 1)!
= (5 - 1)! = 4!
= 24 ways