Question

# If S is any set, then the family of all the subsets of S is called the power set of S and it is denoted by P(S). Power set of a given set is always non-empty. If A has n elements, then P(A) has ?

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Solution

## No .of subsets for a set of n elements is 2n so, If A has n elements, then P(A) has 2n elements.

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