That would mean that all the other grades only had 40 people in each of them. which isn't plausible in the least bit. and you would also be saying that most of the dropouts are concentrated into one class, yet again probaly not going to happen. but how about we say that all of the classes have 80 students in them. that would make a total of 320 students. Let's take the total number of students and find out what 87% of them is 320x.87=278.4. Now lets take the 87% and subtract it from the total number of students, 320-278.4=41.6, that leaves us with 41.6 people who do not graduate, lets divide all these students amongst the classes, 41.6/4=10.4, which means that approximately 10 students per class drop out. this leaves us with 70 students left to graduate. Which is a much more realistic scenario.
Last edited by adfasdfajks; 09/11/09 04:15 AM.