From a survey of 100 college students, a marketing research company found that 50 students owned iPods, 50 owned cars, and 20 owned both cars and iPods.

Answer 1

http://awwapp.com/s/76/cb/3c.html

http://surfari.editme.com/files/VennDiagram/Venn%20Diagram.jpg

Answer 2

50-20 = 30 owned only cars
50-20 = 30 owned only iPods
That leaves 20 outside the diagram boundaries, owning neither iPod nor car
30 car only
30 iPod only
20 both, intersection of circles
20 outside, own neither

Answer 3

20