How many permutations are there in the letters beat?
1 Answer
May 15, 2018
There are
Explanation:
There are

The number of permutations with
#n# elements is#P_n=n!# . Here it is#P_4=4! =1*2*3*4=24# 
The number of possible words can also be calculated this way:

First letter can be chosen in
#4# ways, 
Second letter can only be chosen from
#3# , because one has already been used, 
The third letter can be chosen from
#2# , 
The last letter is picked without any choice; there is only one letter left.
The total number of possibilities can be calculated as the product of all numbers mentioned above: