Question
Given n(A) = 15, n(B) = 20 and n(A ∩ B) = 5. Find n(A ∪ B).
[2 marks]
Tap to take a photo or choose an image
JPG or PNG acceptedWrite with Apple Pencil on iPad (or finger / mouse) — the AI reads your working and grades it.
Type your answer
Loading…
⌨ Math input▾
Grading your answer... please wait
Try it free — the AI marks 3 answers a day.
A free account marks 30 a day.
Sign up free →
📖 Input mode
Study the worked solution, then try one like it. Revealed questions aren't counted.
Back to practice mode