Problema Solution
Fred, ashley, monica and James are the first four batters on a baseball team. The coach is still deciding the order in which to have them bat. how many ways can the coach arrange them.
Answer provided by our tutors
Since tho order of the batters counts we need to find the number of permutations of 4 elements.
The number of permutations of n distinct objects is n×(n − 1)×(n − 2)×⋯×1, which is commonly denoted as "n factorial" and written "n!".
In our case n = 4.
So there are 4! = 1*2*3*4 = 64 ways of arranging them.