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On (A={1,2,3,4,5}), a relation (R) contains all non-diagonal pairs but no diagonal pair. How many pairs must be added to make (R) reflexive?

Answer and explanation

Correct answer: 5

Step 1: Reflexivity needs all five diagonal pairs. Step 2: Since the relation has no diagonal pair, all five must be added. Step 3: Having many non-diagonal pairs does not compensate for missing diagonal pairs.

Related tags

Reflexive RelationNon Diagonal PairsExpertRelations And FunctionsMathematicsClass 12 Mcq

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