Of the 65 cars on a car lot, 30 have air-conditioning, 45 have air bag, and 12 have both air-conditioning and air bag. How many of the cars on the lot have neither air-conditioning nor air bag?  Select:
A) 2
B) 8
C) 10
D) 15
E) 18
Total -Neither = All Air Conditioning + All air bags - Both   or 65 - Neither = 30 + 45 -12= 
<gadget id="calculator">30 + 45 -12</gadget>
<output>63</output>
63.=&gt; Neither = 2, hence C.   Answer : 10
<result>C</result>
Of the 65 cars on a car lot, 30 have air-conditioning, 45 have air bag, and 12 have both air-conditioning and air bag. How many of the cars on the lot have neither air-conditioning nor air bag?