BIGFOOT (B)
21
UFO (U)
42
GHOST (G)
45
4
6
11
2
Believe in UFO, GHOST, and BIGFOOT
According to the information available, we have
n(U)=42
n(G)=45
n(B)=21
n(U⋂G)=11
n(G⋂B)=6
n(U⋂B)=4
n(U⋂G⋂B)=2
Number of people who believed in atleast one of these things
=n(U⋃G⋃B)=n(U)+n(G)+n(B)
-n(U⋂G)-n(G⋂B)
-n(U⋂B)+n(U⋂G⋂B)
=42+45+21-11-6-4+2
=89
Out of 160 people, 89 people believed in the existence of one of these three things.
