If n{A} = 6, n{B} = 5 and n{A ∩ B} = 2, find n{A ∪ B}
- 7
- 8
-
9
- 13
- 15
The correct answer is: C
Explanation
n(A U B) = n(A) + n(B) - n(A n B)
n(A U B) = 6 + 5 - 2 = 9