If A = {1,2,3,4,5}, then the number of proper subsets of A is-

If A = {1,2,3,4,5}, then the number of proper subsets of A is- সঠিক উত্তর 31

Proper subsets must contain atleast one less element than the elements of the main set. If the number of elements of set A is n, the number of proper subsets of that set is 2n - 1 = 25 - 1 = 31.
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