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Read each problem and state whether it is P(n,k) or C(n,k). Then evaluate the permutation...

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Read each problem and state whether it is P(n,k) or C(n,k). Then evaluate the permutation or combination to determine the answer. Show a step of work when evaluating the permutation or combination prior to using your calculator. a. A race has 21 participants. How many ways can first second, and third place be decided assuming there is no tie? b. Alejandro has 38 other students in his class. He plans to invite 6 students to join a study group. How many ways can he select a group of 6 classmates to join the study group?

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