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Question

Let A={x:x is a multiple of 3} and B={x:x is a multiple of 5} then AB is given by

A
{3,6,9,...}
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B
{5,10,15,20,...}
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C
{15,30,45,...}
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D
None of these
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Solution

The correct option is C {15,30,45,...}
Hence

AB will be a multiple of 15.

={15,30,45,60...}

Hence, option 'C' is correct.

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