Mark the correct alternative in the following: If A = {1, 2, 3, 4, 5}, then the number of proper subsets of A is

Question

Philoid · Accepted 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.