Q) Of the 24 dogs attending puppy school
-six are small
-twelve are brown
-fifteen have long hair
-one is small and brown and has long hair
-two are small and brown but their hair is not long
-two are small and have long hair but they are not brown
How many dogs attending puppy school are brown and have long hair, but not small?
The answer is 3
What I did was; 24=6 + 12 + 15 - 2 - 2 - (brown and long hair) + 1
from this, I got 6.
help me! what did it go wrong?