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Question
If A = {1,2,3,4,5} , then the number proper subsets of A is -
120
30
31
32
ANSWER : 3
Descrption
<p>We know, </p><p>Subset = 2<sup>n</sup>-1</p><p>The number of proper sub sets of A is =</p><p>2<sup>5</sup>−1</p><p>=32−1</p><p>=31</p>
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