Given that A and B are sets such that n(A) = 8, n(B)=12 and n(AnB) =3, find n(AuB).
- 15
-
17
- 20
- 23
The correct answer is: B
Explanation
n(AuB) = n(A) + n(B) - n(AnB)
n(AuB) = 8 + 12 - 3
= 17