Chapter 12.3, Problem 44E

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.

Choosing articles for a magazine. Redo Exercises 43, except that in addition to choosing the stories, the editorial staff must also decide in what order the stories will appear.

43. Choosing articles for a magazine. The editorial staff of Oprah’s O Magazine is reviewing 17 articles. They wish to select eight for the next issue of the magazine.