1.

If A and B are 2 sets such that A U B has 40 elements, A has 18 elements and B has 29 elements, how many elements does A ∩ B have? __

Answer»

If A and B are 2 sets such that A U B has 40 elements, A has 18 elements and B has 29 elements, how many elements does A B have? __



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