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GATE | GATE CS 2010 | Question 3
  • Difficulty Level : Medium
  • Last Updated : 09 Dec, 2013

What is the possible number of reflexive relations on a set of 5 elements?
(A) 210
(B) 215
(C) 220
(D) 225


Answer: (C)

Explanation: Number of reflexive relations is 2n2-n which is 220 for n = 5

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