Atheater has 20 rows of chairs. the first row has 16 chairs, the second has 18, the third has 20, and so on. in total, the theater seats people.

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