In a class, there was a probability of 0.4 that a student
had a dog.
If a student had a dog, there was a probability of 0.8 that
they also had a cat.
If a student did not have a dog, there was a probability of
0.3 that they had a cat.
Had a dog
What numbers replace A, B and C in the tree diagram
below?
Give your answers as decimals.