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Question

No of elements in the power set of set A are odd, them the no of elements in the set A are

A
None of these
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B
3
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C
1
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D
5
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Solution

The correct option is A None of these
If a set contains n elements, then its power set will have 2n elements.
Power set of a set has odd no of elements 2n is odd,
Which is possible only when n = 0
So, n = 0
Therefore set A contains no element.

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