A = {1, 9, 6, 5, 3}
B = {2, 7}
A ∩\cap∩ B= …
{1, 2, 3, 5, 6, 7, 9}
{}
{1, 9, 6, 5, 3, 2, 7}
pilihan {1, 2, 3, 5, 6, 7, 9} dan {1, 9, 6, 5, 3, 2, 7} benar