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On (A={1,2,3}), (R={(1,2),(2,1),(2,3),(3,2)}). How many pairs must be added to make (R) both reflexive and symmetric?

Answer and explanation

Correct answer: (3)

Step 1: The relation is already symmetric because every non-diagonal pair has its reverse. Step 2: To make it reflexive, ((1,1),(2,2),(3,3)) must be added. Step 3: Check symmetry and reflexivity separately; do not mix the two properties.

Related tags

Reflexive And SymmetricMinimum AdditionClass 12Symmetric RelationRelations And FunctionsMathematicsClass 12 Mcq

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