Bunuel wrote:
In a certain kindergarten, every child has got either a dog or a cat or both. 18 children have got dogs only and 6 children have got both dogs and cats. If there are 30 children in the kindergarten, how many of them have cats?
A. 6
B. 12
C. 14
D. 16
E. 20
We can use the equation:
Total = Dogs only + Cats only + Both + Neither
30 = 18 + c + 6 + 0
30 = 24 + c
6 = c
Since 6 children have cats only and another 6 children have both cats and dogs, 12 children have cats.
Answer: B
...
