In a recent survey, Q people were asked whether they eat after 22:00 O'clock. 25 percent of the people answered positively and 40 percent of the rest were asked, at what time do they get up in the morning. Which of the following expressions represents the number of people who do not eat after 22:00 and were not asked about the time they get up in the morning?
Answers:
A) 3Q/20.  B) Q/10  C) 5Q/9  D) 3Q/10  E) 9Q/20
Assume Q=100   100-25= 
<gadget id="calculator">100-25</gadget>
<output>75</output>
75 people said they ate before 22:00   75*0.4= 
<gadget id="calculator">75*0.4</gadget>
<output>30</output>
30 people were asked what time they got up in the morning    25+30= 
<gadget id="calculator"> 25+30</gadget>
<output>55</output>
55 people were either asked what time they got up in the morning OR ate after 22:00   100-55= 
<gadget id="calculator">100-55</gadget>
<output>45</output>
45 or 45% of Q were the number of people who did neither.   E is the equation for 45% of Q.   Answer: 9Q/20
<result>E</result>
In a recent survey, Q people were asked whether they eat after 22:00 O'clock. 25 percent of the people answered positively and 40 percent of the rest were asked, at what time do they get up in the morning. Which of the following expressions represents the number of people who do not eat after 22:00 and were not asked about the time they get up in the morning?