A = {2, 3, 4, 5, 6} and B = {3, 5, 7, 9}, find A∩ B .
A
{3, 5}
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B
{3, 2}
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C
{4, 5}
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D
None of the above
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Solution
The correct option is A {3, 5} The intersectionA ∩ B of two sets A and B is the set that contains all elements of A that also belong to B (or equivalently, all elements of B that also belong to A), but no other elements.
In the given sets A and B, the elements 3 and 5 are common i.e., A∩ B={3, 5}.