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Let S={1,2,3,4,5,6,9}. Then the number of elements in the set T={A⊆S:A≠ϕ and the sum of all the elements of A is not a multiple of 3} is

Answer» Let S={1,2,3,4,5,6,9}. Then the number of elements in the set T={AS:Aϕ and the sum of all the elements of A is not a multiple of 3} is


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