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If a symmetric relation on (A={1,2,3,4,5}) has exactly (3) off-diagonal pair groups and exactly (2) diagonal pairs, how many ordered pairs are there in total?

Answer and explanation

Correct answer: (8)

Step 1: Each off-diagonal pair group contributes (2) ordered pairs. Step 2: (3) groups give (6) off-diagonal pairs, and with (2) diagonal pairs the total is (8). Step 3: Remember the difference between pair groups and actual ordered pairs.

Related tags

Pair GroupsCountingSymmetric RelationClass 12Relations And FunctionsMathematicsClass 12 Mcq

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