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If (R) is a reflexive relation on (A={1,2,3}) with exactly 4 pairs, how many of those 4 pairs must be self-pairs?

Answer and explanation

Correct answer: 3

Step 1: (A) has 3 elements, so 3 self-pairs are compulsory. Step 2: Out of the 4 pairs, 3 must be ((1,1),(2,2),(3,3)). Step 3: The remaining one may be any non-diagonal pair.

Related tags

Exact PairsReflexive RelationSelf PairsMediumRelations And FunctionsMathematicsClass 12 Mcq

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