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windsylph Group Title

How many numbers must be selected from the set {1, 3, 5, 7, 9, 11, 13, 15} to guarantee that at least one pair of these numbers add up to 16?

  • 2 years ago
  • 2 years ago

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  1. ChrisS Group Title
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    There are 4 pair of numbers that add up to 16. So you would need to choose at least 5 numbers to ensure that you got at least one of those pairs.

    • 2 years ago
  2. windsylph Group Title
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    thank you!

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