(a) In how many ways can persons A, B, C be lined up? List all possible permutations of these persons. (b) In how many ways can Marek send five different postcards from his vacation to five of his friends?

College Algebra (MindTap Course List)
12th Edition
ISBN:9781305652231
Author:R. David Gustafson, Jeff Hughes
Publisher:R. David Gustafson, Jeff Hughes
Chapter8: Sequences, Series, And Probability
Section8.6: Permutations And Combinations
Problem 4SC
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(a) In how many ways can persons A, B, C be lined up? List all possible permutations of these persons.
(b) In how many ways can Marek send five different postcards from his vacation to five of his friends?

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