In the city of San Durango, 60 people own cats, dogs, or rabbits. If 30 people owned cats, 40 owned dogs, 10 owned rabbits, and 8 owned exactly two of the three types of pet, how many people owned all three?
Choose one:
A) 2
B) 4
C) 6
D) 12
E) 32
You are considering a case when cat dogs and rabbit are not exactly equal to 12 .   The solution shall be 60=30+40+10-8-2x   and hence x shall be 6   Answer 6
<result>C</result>
In the city of San Durango, 60 people own cats, dogs, or rabbits. If 30 people owned cats, 40 owned dogs, 10 owned rabbits, and 8 owned exactly two of the three types of pet, how many people owned all three?