At a certain conference, 52% of the attendees registered at least two weeks in advance and paid their conference fee in full. If 30% of the attendees who paid their conference fee in full did not register at least two weeks in advance, what percent of conference attendees registered at least two weeks in advance?  Choose the correct answer:  A) 18.0%  B) 62.0%  C) 79.2%  D) 74.28%  E) 82.0%
Refer to the table in the attachment:   Let x= No. of members who have paid in Full   30 % members paid in full and did not register in advance = 0.3x   52 % registerd in advance and paid in full.   So if total No. of members = 100, then 52 members paid Full and registered in advance.   Hence total members who paid full amount = 0.3x + 52 =x   0.7x =52   Hence x = 74.28   i.e. 74.28 out of 100 or 74.28 %   Ans. 74.28%
<result>D</result>
At a certain conference, 52% of the attendees registered at least two weeks in advance and paid their conference fee in full. If 30% of the attendees who paid their conference fee in full did not register at least two weeks in advance, what percent of conference attendees registered at least two weeks in advance?