If a set contains n elements, then write the number of elements in its power set.
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If a set contains n elements, then write the number of elements in its power set.
If a set contains n elements, then write the number of elements in its power set.
Let A be the set with n elements.
Then power set of A contains all the subsets of A.
Each member of A has two possibilities either present or absent.
⇒ Total possible subsets of A are 2×2×2×…n times= 2n
∴ number of elements in power set of A are 2n.
2n elements are present in power set.