Of the 550 people attending a conference, 300 have signed up for the Marketing workshop and 400 have signed up for the Accounting workshop. If 110 of the people attending did not sign up for either workshop, then the number of people who signed up for both the Marketing and the Accounting workshops is:  Choose the correct choice from the following options.
A) 245	B) 260	C) 275	D) 280	E) 300
Since the information in the prompt refers to the 'standard' 5 groups, you can use the Overlapping Sets Formula to get to the solution:   Total = Gp.1 + Gp.2 - 260oth + Neither   550 = 300 + 400 - 260oth + 110   550 = 810 - 260oth   260oth = 260   Final Answer:   260
<result>B</result>
Of the 550 people attending a conference, 300 have signed up for the Marketing workshop and 400 have signed up for the Accounting workshop. If 110 of the people attending did not sign up for either workshop, then the number of people who signed up for both the Marketing and the Accounting workshops is: