Suppose I had the set {1,2,3} and wanted to make a list of 5 of those elements that contained one element from the set and a pair of duplicates. For example, (2, 1, 3, 3, 1). The 2 is the single element and the pair of duplicates is 1,1 and 2,2. How many ways can this be done?

Suppose I had the set {1,2,3} and wanted to make a list of 5 of those elements that contained one element from the set and a pair of duplicates. For example, (2, 1, 3, 3, 1). The 2 is the single element and the pair of duplicates is 1,1 and 2,2. How many ways can this be done?

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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