There are 69 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?  Choose the correct choice:
A) 2  B) 4  C) 8  D) 39  E) 32
lets assign variables to all the areas in Venn Diagram of Three.   three different Units are 39OG, Cat, Snake= Total = 69   Only 39og= d=15   Only Cat = c=10   Only Snake = s   Exactly 39og and Cat= 5   Exactly 39og and Snake = x   Exactly Cat and Snake = y   all three= 3   so 69=15+10+5+3+x+y+s   we need to know total snakes= x+y+s+3 = 39   answer:39
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There are 69 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?