1.

The number of unordered pairs (A,B) of subsets of the sets S={1,2,3,4,5,6} such that A∩B=ϕ and A∪B=S is

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The number of unordered pairs (A,B) of subsets of the sets S={1,2,3,4,5,6} such that AB=ϕ and AB=S is



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