Chapter 12.3, Problem 31E

In Exercises 31–44, specify the number of ways to perform the task described. Give your answers using $\text{P}\left(\text{n, r}\right)\text{ or C}\left(\text{n, r}\right)$ notation. The key in recognizing whether a problem involves permutations or combinations is deciding whether order is important.

Quiz possibilities. On a biology quiz, a student must match eight terms with their definitions. Assume that the same term cannot be used twice.