How many ways are there to seat 25 people?

Answer 1

There are about 2 sensible reasons. You get 25 chairs tell the 25 people to sit. Tell them to sit on the floor.

Answer:

25 people can be seated in 25! ways (25! is factorial 25, or 25x24x22x21 ....x3x2x1) as the first chair can be filled in 25 ways, the second in 24, the third in 23 and so on. This comes to 1.5511210043 × 1025 different ways