Posted by kitkat on Sunday, November 28, 2010 at 10:44am.
From 85 Records at D.S. Collegiate, the following data was collected: 12 studied Sociology, Economics and Accounting, 27 studied sociology and accounting, 20 studied economics and accounting, 21 studied economics and sociology, 36 studied sociology, 36 studied economics and 58 studied accounting
a) Draw a Venn Diagram to represent the situation
b) How many student records were examined?
c) How many students studied Sociology but neither the business subjects?

math 12  Reiny, Sunday, November 28, 2010 at 11:09am
Draw your 3 overlapping circles.
Place 12 in the intersection of all three.
Now look at the sociology and accounting overlap, 12 are already included leaving you with 2712 or 15 to go in the part showing only sociology and accounting overlap.
Continue in this fashion ... 
math 12  kitkat, Sunday, November 28, 2010 at 11:56am
Ok I did that but when I finished, I got a answer that no one took Sociology alone and 74 students records were examined. Can you please check this?

math 12  Reiny, Sunday, November 28, 2010 at 2:56pm
correct