How many numbers must be selected from the set {1, 2, 3, 4, 5, 6} to guarantee thatat least one pair of these numbers add up to 7
Question
Solution 1
To answer this question, we need to look at the pairs of numbers in the set {1, 2, 3, 4, 5, 6} that add up to 7. These pairs are (1,6), (2,5), and (3,4).
So, to guarantee that at least one pair of these numbers add up to 7, we would need to select 4 numbers.
Here's why:
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