Chat with our AI personalities
36
The number of ways is 18C5 = 18!/(5!*13!) = 8,568 ways.
There are 12 ways.
3 items (or people) can line up in 6 different sequences. 6 items (or people) can line up in 720 different sequences.
7 X 6 X 5 X 4 X 3 X2 X 1 = 5040 different ways that seven people can be seated in one row of seven people.