A survey of 280 families showed that 60 had a dog only;
40 had a cat only;
23 had a parakeet only;
19 had a dog and a parakeet;
37 had a dog and a cat,;
5 had a cat and a parakeet, but not dog
105 had neither a cat nor a dog, and in addition did not have a parakeet;
How many had a parakeet and cat and dog?