2013 · Q25
Consider the following in respect of the sets A and B:
- 1(A ∩ B) ⊆ A
- 2(A ∩ B) ⊆ B
- 3A ⊆ (A ∪ B)
Which of the above are correct?
Elementary MathematicsSets
- A1 and 2 only
- B2 and 3 only
- C1 and 3 only
- D1, 2 and 3
Explanation
All three are standard set inclusions. Answer D.