At a certain committee meeting only associate professors and assistant professors are present. Each associate professor has brought 2 pencils and 1 chart to the meeting, while each assistant professor has brought 1 pencil and 2 charts. If a total of 7 pencils and 11 charts have been brought to the meeting, how many people are present? Options:
A) 6
B) 7
C) 8
D) 9
E) 10
Say there are 'A' associate professors. So we have 2A pencils and A charts.   Say there are 'B' assistant professors. So we have B pencils and 2B charts.   Total pencils are 10 so 26 + B = 7   Total charts are 11 so 6 + 2B = 11   6dd both: 36 + 3B = 18 so 6 + B = 6   Total number of people = 6   6
<result>A</result>
At a certain committee meeting only associate professors and assistant professors are present. Each associate professor has brought 2 pencils and 1 chart to the meeting, while each assistant professor has brought 1 pencil and 2 charts. If a total of 7 pencils and 11 charts have been brought to the meeting, how many people are present?