Question

If A = {4, 7, 10, 13, 17) and B = {3, 5, 7, 9), then which of the following statements Is true?

BCA
AUB=(7)
BCB

Answer 1

The answer is the last one.

B isn’t a proper subset of A because A doesn’t have elements 3, 5, and 9. A U B = {4, 7, 10, 13, 17, 3, 5, 9}, not {7}. Only B is a subset of B is true because every set is a subset of itself.