There are 59 people that own pets. 15 people own only dogs, 10 people own only cats, 5 people own ...
There are 59 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?
Answer/Solution
29
Steps/Work
lets assign variables to all the areas in Venn Diagram of Three.
three different Units are DOG, Cat, Snake= Total = 59
Only Dog= d=15
Only Cat = c=10
Only Snake = s
Exactly Dog and Cat= 5
Exactly Dog and Snake = x
Exactly Cat and Snake = y
all three= 3
so 59=15+10+5+3+x+y+s
we need to know total snakes= x+y+s+3 = 29
answer:D
three different Units are DOG, Cat, Snake= Total = 59
Only Dog= d=15
Only Cat = c=10
Only Snake = s
Exactly Dog and Cat= 5
Exactly Dog and Snake = x
Exactly Cat and Snake = y
all three= 3
so 59=15+10+5+3+x+y+s
we need to know total snakes= x+y+s+3 = 29
answer:D