Let the set A is {1, 2, 3} and B is {2, 3, 4}. Then the number of elements in A U B is?
A. 4
B. 5
C. 6
D. 7
Answer:A
Let the set A is {1, 2, 3} and B is {2, 3, 4}. Then the number of elements in A U B is?
A. 4 B. 5 C. 6 D. 7
Explanation: AUB is {1, 2, 3, 4}.