There are 89 people that own pets. 15 people own only dogs, 10 people own only cats, 5 people own only cats and dogs, 3 people own cats, dogs and snakes. How many total snakes are there?
Answers: A) 2 B) 4 C) 8 D) 59 E) 32
lets assign variables to all the areas in Venn Diagram of Three.   three different Units are 59OG, Cat, Snake= Total = 89   Only 59og= d=15   Only Cat = c=10   Only Snake = s   Exactly 59og and Cat= 5   Exactly 59og and Snake = x   Exactly Cat and Snake = y   all three= 3   so 89=15+10+5+3+x+y+s   we need to know total snakes= x+y+s+3 = 59   answer:59
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There are 89 people that own pets. 15 people own only dogs, 10 people own only cats, 5 people own only cats and dogs, 3 people own cats, dogs and snakes. How many total snakes are there?