of the 75 cars on a car lot, 45 have air - conditioning, 35 have power steering, and 12 have both air - conditioning and power steering. how many of the cars on the lot have neither air - conditioning nor power steering?  Choose the correct choice from the following choices.
A) 7	B) 8	C) 10	D) 15	E) 18
<gadget id="calculator">45 + 35</gadget>
<output>80</output>

<gadget id="calculator">80 - 12</gadget>
<output>68</output>

<gadget id="calculator">75 - 68</gadget>
<output>7</output>

<result>A</result>
of the 75 cars on a car lot, 45 have air - conditioning, 35 have power steering, and 12 have both air - conditioning and power steering. how many of the cars on the lot have neither air - conditioning nor power steering?
subtract(75, subtract(add(45, 35), 12))
"total - neither = all air conditioning + all power steering - both or 75 - neither = 45 + 35 - 12 = 68 . = > neither = 7 , hence a . answer : a"