Question

2 circles labeled Set A and Set B overlap. Set A contains 1, set B contains 3, and the overlap of the 2 circles contains 2. The number 4 is outside of the circles.
On the Venn diagram, which region(s) represent the union of Set A and Set B (A⋃B)?

II
I and III
I, II, and III
I, II, III, and IV

Answer 1

I, II, and III.

Explanation: A ∪ B includes all elements in either circle (A only = 1, overlap = 2, B only = 3), so A ∪ B = {1, 2, 3}.