1.

The number of subsets of a set containing n elements is A. n B. 2n− 1 C. n2 D. 2n

Answer»

Let A be the set with n elements. 

Each member of A has two possibilities either present or absent. 

⇒ Total possible subsets of A are 2 × 2 × 2 ×…n times = 2n



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