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

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Mr. Dubey

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📊 Discrete Mathematics

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

(A) 14
(B) 5
(C) 9
(D) 24

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✅ Correct Answer: (B) 5

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