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If A = {1, 2, 3, 4, 5}, then the number of proper subsets of A is A. 120 B. 30 C. 31 D. 32 |
Answer» Here, n(A) = 5 ⇒n(P(A) ) = 25 = 32 So, A has total 32 subsets but one of them is A itself. ∴ Proper subsets of A are 32 -1 = 31. |
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