In the parking lot there are 50 vehicles, 30 of them are buses, and the rest are cars. The color of 30 vehicles is red, of which 18 are buses. How many cars can be found in the parking lot which are not colored red?  Pick:
A) 4
B) 5
C) 6
D) 7
E) 8
The number of cars is 50-30= 
<gadget id="calculator">50-30</gadget>
<output>20</output>
20.   The number of red cars is   30-18= 
<gadget id="calculator">  30-18</gadget>
<output>12</output>
12.   The number of cars which are not red is  20-12= 
<gadget id="calculator"> 20-12</gadget>
<output>8</output>
8.   The answer is 8.
<result>E</result>
In the parking lot there are 50 vehicles, 30 of them are buses, and the rest are cars. The color of 30 vehicles is red, of which 18 are buses. How many cars can be found in the parking lot which are not colored red?