Let `S = {1,2,3,..., 40}` and let A be a subset of S such that notwo elements in A have their sum divisible by 5. What is themaximum number of elements possible in A?A. 10B. 13C. 17D. 20

Let `S = {1,2,3,..., 40}` and let A be a subset of S such that notwo e

1.	Let `S = {1,2,3,..., 40}` and let A be a subset of S such that notwo elements in A have their sum divisible by 5. What is themaximum number of elements possible in A?A. 10B. 13C. 17D. 20
Answer» Correct Answer - C `A={1,2,6,7,11,12,16,17,21,22,26,27,31,32,36,37}` & One of the element which is multiple of 5 `B={3,4,8,9,13,14,18,19,23,24,28,29,33,34,38,39}` & One of the element which is multiple of 5

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Let `S = {1,2,3,..., 40}` and let A be a subset of S such that notwo elements in A have their sum divisible by 5. What is themaximum number of elements possible in A?A. 10B. 13C. 17D. 20

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