How many numbers must be selected from the set {1, 2, 3, 4, 5, 6} to guarantee

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How many numbers must be selected from the set {1, 2, 3, 4, 5, 6} to guarantee that at least one pair of these numbers add up to 7?

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Discrete Mathematics and Its Applications

ISBN: 978-0073383095

7th edition

Authors: Kenneth H. Rosen

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Question Posted: May 03, 2016 01:39 AM

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How many numbers must be selected from the set {1, 2, 3, 4, 5, 6} to guarantee

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We can apply the pigeonhole principle by grouping the numbers cleverly into pairs subsets that ...View the full answer

Discrete Mathematics and Its Applications

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