Question

Given the following sets.

A = {0, 1, 2, 3}
B = {a, b, c, d}
C = {0, a, 2, b}

Find B U C

A) {0, 1, 2, 3}
B) {a, b, c, d}
C) {0, a, 2, b}
D) empty set
E) {a, b, c, d, 0, 2}

Answer 1

B U C means the union of the 2 sets so each it contains all the elements in both sets

Answer is E  (Note:  elements are not repeated)

Answer 2

B = {a, b, c, d}

C = {0, a, 2, b}

B ∪ C = {a, b, c, d, 0, 2}

Answer: E)

Everything from the set B and everything from the set C give to one set. Duplicated elements are written only once.