of the 75 house in a development, 50 have a two - car garage, 40 have an in - the - ground swimming pool, and 35 have both a two - car garage and an in - the - ground swimming pool. how many houses in the development have neither a two - car garage nor an in - the - ground swimming pool?  Choose the most appropriate option.
A) 10
B) 15
C) 20
D) 25
E) 30
<gadget id="calculator">50 - 35</gadget>
<output>15</output>

<gadget id="calculator">40 - 35</gadget>
<output>5</output>

<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<gadget id="calculator">20 + 35</gadget>
<output>55</output>

<gadget id="calculator">75 - 55</gadget>
<output>20</output>

<result>C</result>
of the 75 house in a development, 50 have a two - car garage, 40 have an in - the - ground swimming pool, and 35 have both a two - car garage and an in - the - ground swimming pool. how many houses in the development have neither a two - car garage nor an in - the - ground swimming pool?
subtract(75, add(add(subtract(50, 35), subtract(40, 35)), 35))
"neither car nor garage = total - garage - ( swim - common ) = 75 - 50 - ( 40 - 35 ) = 75 - 55 = 20 answer c"