Townville has 100 residents, and 30 of them are females. If half of Townville’s male residents are smokers, and 1/3 of the female residents are smokers, which of the following represents the total number of Townville’s residents who are NOT smokers?	Choose the correct choice from the following answers.
A) 55	B) 65	C) 25	D) 22	E) 21
Number of people =100   Females = 30   men = 100-30= 
<gadget id="calculator">100-30</gadget>
<output>70</output>
70   Half of the men are smoker  70/2= 
<gadget id="calculator">  70/2</gadget>
<output>35</output>
35, that means the remaining men 70-35= 
<gadget id="calculator">70-35</gadget>
<output>35</output>
35 are non smokers.   1/3 females are smoker. i.e 1/3*30= 10.   30-10= 
<gadget id="calculator">30-10</gadget>
<output>20</output>
20 females are non smokers   So, total number of non smokers in the town are 35+20= 
<gadget id="calculator">35+20</gadget>
<output>55</output>
55   55nswer : 55
<result>A</result>
Townville has 100 residents, and 30 of them are females. If half of Townville’s male residents are smokers, and 1/3 of the female residents are smokers, which of the following represents the total number of Townville’s residents who are NOT smokers?