Question

2. Let A be the set of the first 12 natural numbers:
A =

{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
Let S be a subset of A such that 6 ∈ S; 7 ∈/ S; n

S

= 6; Sum of the elements of S is divisible by 7.
The total number of such possible subsets S i

Answer 1

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Answer 2

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