Question 376061
The cardinality of A intersection B = 3.
The cardinality of A U B is 50 + 50 - 3 = 97.
The cardinality of (A intersection B) U A = 50, or the cardinality of (A U B)intersection A = 50, whichever the case is (the symbols are not appearing on the screen!).
The cardinality of A x B = 50*50 = 2,500.