The number of elements in power set {1.2.3} is?

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The number of elements in power set {1.2.3} is? Answer: 8

The power set of a set is the set of all possible subsets, including the empty set and the set itself.For a set with n elements, the power set contains 2ⁿ elements.Here, the set {1, 2, 3} has 3 elements, so:2³ = 8