Intermediate Microeconomics and Its Application 12th Edition by Walter Nicholson,Christopher Snyder

Exercise 10

Which of these relationships would be better modeled as involving repetitions and which not, or does it depend? For those that are repeated, which are more realistically seen as involving a definite number of repetitions and which an indefinite number?
a. Two nearby gas stations posting their prices each morning
b. A professor testing students in a course
c. Students entering a dorm room lottery together
d. Accomplices committing a crime
e. Two lions fighting for a mate