Here is the question:
I have posted a link there to this topic so the OP can see my work.Please help you must draw Venn diagrams and solve with equation, but I cant seem to get the answers!
There is a seminar in which 34 students participated. Every student got a certificate, 14 in biology, 13 in chemistry and 21 in physics, and only 3 students got all three certificates. How many got certificates in only one area and how got certificates in only two areas?? Please help you must draw Venn diagrams and solve with equation but i cant seem to get the answers