Displaying Column/Row names from Table

Hello.

I'm trying to develop a table comparing probabilities of success from certain attributes. I basically, want to find out the probability of a success in the scenario (row selection) vs (Column Selection), which is in the table attached. For example, Z vs X is 40%, how would I make it so that my Excel sheet displays this automatically when I select Z as choice 1, and X as choice 2?

Some help would be greatly appreciated.
Thanks!