In Exercises 1720, does the problem involve permutations or combinations Explain your
Chapter 8, Problem 17(choose chapter or problem)
In Exercises 1720, does the problem involve permutations or combinations? Explain your answer. (It is not necessary to solve the problem.) A medical researcher needs 6 people to test the effectiveness of an experimental drug. If 13 people have volunteered for the test, in how many ways can 6 people be selected?
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