100 pet owners were asked
if they owned a cat or a dog.
44 of them owned a cat altogether.
76 of them owned a cat or a dog or both.
10 of them owned a cat and a dog.
Fill in the numbers in the Venn diagram.
Find the probability that a pet
owner chosen at random owns:
a) neither a cat nor a dog
b) a dog
c) a dog but not a cat