Groups each containing 3 boys are to be formed out of 5 boys___A, B, C, D and E___such that no one group contains both C and D together. What is the maximum number of such different groups?

Groups each containing 3 boys are to be formed out of 5 boys___A, B, C, D and E___such that no one group contains both C and D together. What is the maximum number of such different groups?

(a) 5
(b) 6
(c) 7
(d) 8

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