There are two fish tanks in a pet shop.
In tank A there are four white fish and one black fish.
In tank B there are three white fish and four black fish.
One fish is to be taken out of tank A at random.
One fish is to be taken out of tank B at random.
Using a tree diagram, or otherwise, calculate the probability that
(a) the two fish will both be white
(b) the two fish will be of different colours
Do you think i should give my answer in decimals or fractions?
What answers did you get?