UPSC NDA I 2011 Mathematics Paper

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Question : 24 of 120

Marks: +1, -0

If A={1,2,5,6} and B={1,2,3}, then what is (A×B)∩(B×A) equal to?

{(1,1),(2,1),(6,1),(3,2)}
{(1,1),(1,2),(2,1),(2,2)}
{(1,1),(2,2)}
{(1,1),(1,2),(2,5),(2,6)}

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