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If (R={(1,2),(2,1),(1,3),(3,1),(2,4)}), what is the minimum number of pairs needed to make it symmetric?

Answer and explanation

Correct answer: (1)

Step 1: The pair ((1,2)) and ((2,1)) is complete. Step 2: The pair ((1,3)) and ((3,1)) is also complete; only the reverse ((4,2)) of ((2,4)) is missing. Step 3: For minimum addition, count only missing reverse pairs.

Related tags

Symmetric ClosureMinimum PairsOrdered PairsSymmetric RelationRelations And FunctionsMathematicsClass 12 Mcq

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