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ISRO | ISRO CS 2017 | Question 8
  • Difficulty Level : Basic
  • Last Updated : 23 Dec, 2020

The number of elements in the power set of { {1, 2}, {2, 1, 1}, {2, 1, 1, 2} } is

(A) 3
(B) 8
(C) 4
(D) 2


Answer: (D)

Explanation: This set has only one element because of no order and identical elements.
So, total number of elements in power set of given set = 2n = 21 = 2

So, option (D) is correct.

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