[SPLIT] Find prob he takes Train C, Bus 3 on way home, if

Hi I really need help whit "theoretical probability". My first question is.

1) In the table below, each letter represents a train, and each number represents a bus.

train bus
a 1 2 3 4
b
c

To get home from work, Matt must take one of three trains to get to his town. Then he has a choice of four busses to get to his house. If Matt randomly chooses a way home, what is the probabbility that he will choose train C and bus 3?

If we told you there is a 1/3 chance that he takes train C, would you believe us?

If you do, then what is his chance of taking bus 3 ?