In how many ways can four people sit around a circular table? Seating arrangements are considered different only if at least one person has at least one different neighbor.

What is the relationship between all triangles that can be drawn given the same three angles

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Identify all the cases where non-probability sampling is used when attempting to study the characteristics of a large city. studies on every subject in the population divide a population in groups and obtain a sample studies with a limited amount of time demonstrate existing traits in a population studies with the nth person selected