I would like someone to confirm whether this is correct or not. Thanks!
A = { 1, 2, ∅ } list all the subsets of set A.
since the number of subsets in one set = 2^(cardinality of the set), and the cardinality of 3 in set A. We have 2^(3) = 8, 8 possible subsets.
all 8 possible subsets are : {1}, {2}, {∅}, {1, 2}, {1, ∅}, {2, ∅}, {1, 2, ∅}, and ∅