In the city of San Durango, 80 people own cats, dogs, or rabbits. If 50 people owned cats, 20 owned dogs, 30 owned rabbits, and 16 owned exactly two of the three types of pet, how many people owned all three? Pick: A) 1 B) 2 C) 4 D) 7 E) 9
Total = C + D + R - (CD + DR + CR) - 2CDR   80 = 50 + 20 + 30 - (16) - 2x   x = 2   So, answer will be 2
<result>B</result>
In the city of San Durango, 80 people own cats, dogs, or rabbits. If 50 people owned cats, 20 owned dogs, 30 owned rabbits, and 16 owned exactly two of the three types of pet, how many people owned all three?