Ghosts
45-(9+2+4)=30
UFOs
42-(9+2+2)=29
Bigfoot
21-(4+2+2)=13
11-2=9
6-2=4
4-2=2
2
Rosemarie Russell
One hundred sixty people were surveyed
2 believed in all three
6 believed in ghosts and Bigfoot
4 believed in UFOs and Bigfoot
11 believed in UFOs and ghosts
42 believed in UFOs
21 believed in Bigfoot
45 believed in ghosts
How many people surveyed believed in at least one of these things?
Answer is 30+29+13=72 people believed in at least one.
89 is the total of all sets.
160-89 = 71 believed in none at all.
