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Question

A={1,2,4},B={2,4,5},C={2,5},then (AB)(BC) is

A
{1,2,5}
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B
{1,4}
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C
{1,3}
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D
None of these.
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Solution

The correct option is B {1,4}
AB={1},BC={4}
(AB)U(BC)={1,4}

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