Determine whether the following problem involves a permutation or combination. (It is not necessary to solve the problem.) A medical researcher needs 29 people to test the effectiveness of an experimental drug. If 94 people have volunteered for the test, in how many ways can 29 people be selected? The problem involves a because the of patients selected matter. Use the formula for Cr to evaluate the given expression. 10C5 = 10C5 252 (Type an integer or a simplified fraction.) An election ballot asks voters to select six city commissioners from a group of fourteen candidates. In how many ways can this be done? Six city commissioners can be selected from a group of fourteen candidates in 3003 different ways. Solve by a method of your choice. A medical researcher needs 8 people to test the effectiveness of an experimental drug. If 15 people have volunteered for the test, in how many ways can 8 people be selected? The 8 people can be selected in 3003600 ways. (Simplify your answer. Type a whole number.) Use the spinner shown to answer the question. Assume that it is equally probable that the pointer will land on any one of the colored regions. If the pointer lands on a borderline, spin again. If the spinner is spun once, find the probability that the pointer lands in a region that is green or red. The probability that the pointer lands in a region that is green or red is (Type an integer or a simplified fraction.) 12 yellow blue green red green red blue yellow