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Question

Assertion :The number of non empty subsets of the set {a,b,c,d} are 15. Reason: Number of non empty subsets of a set having n elements are 2n1.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
A={a,b,c,d}

n(A)=4
Number of subset of A=24=16 out of which only one set is empty set because empty set is subset of every set.
Number of non empty subset of A=241=15

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