1. A permutation is an arrangement of elements from a single set.
2. Repetitions are not allowed.
3 The order in which the elements are arranged is significant.

Example 1:
How many permutations can you make of 4 people selected from a group of 35?
The first person can be selected in 35 ways. The next can be selected in 34 ways, the third can be selected in 33 ways, and the fourth can be selected in 32 ways.
By the Fundamental Counting Principle the total number of permutations is:
35 x 34 x 33 x 32 = 1,256,640

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