• Combinatorics
• Permutations
• P 2.
• P 3
• Combinations
• C 2
• Binomial C.
• Pascal's T.

The circular permutations are used when the elements have to be arranged "in a circle" order, (for example, the guests around a table at a dinner party), so that the first element that "is located" in the sample determines the beginning and the end of the sample.

Examples

1. Calculate the circular permutations of 7 elements.

PC₇= (7 − 1)! = 6! = 6 · 5 · 4 · 3 · 2 · 1 = 720

2. How many ways can eight people sit around a round table?

• 
• 
•