Mathematics for IGCSE & O level - Sets (Section 1 - No. 9)
What is represented by the shaded area in a Venn diagram showing the union of two sets, A and B?
A ∩ B
A ∪ B
A - B
B - A
คำอธิบาย
The union is all the elements of A combined with all the elements of B (or both).