How many subsets do a set {4,5,6,7} have ?
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What are all the possible subsets of the given set A={1, 2, 3, 4, 5, 6, 7}? The set of all possible subsets of a given set is called “the Power Set” of that set. The cardinal of P(A) is 2^7 = 128 elements. So, A has 128 possible subsets.
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