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Question

A={2,4,6,8,10,12} and B={3,6,9,12}
Find A Δ B.

A
{2,10}
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B
{2,4,8,10}
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C
{2,3,4,8,9,10}
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D
{6,12}
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Solution

The correct option is C {2,3,4,8,9,10}
A Δ B=(AB) (BA)
=({2,4,6,8,10,12}{3,6,9,12}) ({3,6,9,12}{2,4,6,8,10,12})
={2,4,8,10} {3,9}
={2,3,4,8,9,10}

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