James was a visitor on an animal-spotting trip. The
probabilities of a visitor seeing crocodiles and hippos on
the trip are given in the tree diagram below.
Given that James saw exactly one of these types of
animal, what is the probability that he saw a crocodile?
Give your answer as a fraction in its simplest form.
Saw a crocodile
Yes
No
Saw a hippo
5/60
16
Na
79
Yes
No
Yes
N