au=bernauthor basedon=2.3 Section Exercise 5 bau=Bello bname=Topics in Contemporary Mathematics by Bello 2008, ed. 9, ISBN 0618775242 book=usf_math_bello_tcm_9e btitle=Topics in Contemporary Mathematics chap=2 cname=Sets comm=p5 difflev=0 edt=9 error=Wrong number of choices for multiple-choice question (1). extlink= gradable=1 ilev=0 isbn=0618775242 kw= lo=2.3.1 loname=Drawing Venn Diagrams page= parse=preview pr=bernproofer pt=full sect=3 sname=Venn Diagrams source= spell=preview st=gold taxon= tname=venn diagram view=edit_h warn=0 year=2008