Try another version of this question Let `S = {1,2,3,...,18,19,20}` be the universal set. Let sets `A` and `B` be subsets of `S`, where: Set `A = \{1,4,6,12,13,14,15,16,17,18,20}` Set `B = \{1,2,7,9,11,14,17}` Determine the following: `n(A)=` `n(B)=` 11 7
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