Question

in how many ways can 5 different trees be planted in a circle

Answer 1

The information here will enable you to solve it:
http://tutors4you.com/circularpermutations.htm

Answer 2

:D
so its (5-1)! i guess

Answer 3

lol i was thinking you're going to explain :o

Answer 4

hehe well yeah wanna explain :P

Answer 5

There is a formula for the circle
(n-1)!

(4)! =4*3*2*1=

Answer 6

:D

Answer 7

that link has nice explanation :
number of circular arrangements of \(n\) different objects = \(\dfrac{n!}{n}\)
because for each circular arrangement, there will be \(n\) different linear arrangements

Answer 8

yep ,cool