Mathematics for IGCSE & O level - Sets (Section 1 - No. 23)
If the set A = {1, 3, 5, 7} and B = {7, 9, 11}, what is A ∩ B?
{7}
{1, 3, 5, 7, 9, 11}
{ }
{1, 3, 5, 9, 11}
Explanation
The intersection contains only the common elements, which is 7.
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