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You are given infinite coins of denominations 1, 3, 4. What is the minimum number of coins required to achieve a sum of 7?

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You are given infinite coins of denominations 1, 3, 4. What is the minimum number of coins required to achieve a sum of 7?

(a) 1

(b) 2

(c) 3

(d) 4
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Correct option is (b) 2

The best explanation: A sum of 7 can be achieved by using a minimum of two coins {3,4}.
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