Every staff in an office owns either a Mercedes and/or a Toyota car. 20 own Mercedes, 15 own Toyota and 5 own both. How many staff are there in the office?
-
A.
25 -
B.
30 -
C.
35 -
D.
45
Correct Answer: Option B
Explanation
M = Mercedez; T = Toyota
Number of staff = 0 + (20 – 5) + (15 – 5) + 5
0 + 15 + 10 + 5 = 30