I'm looking for the equivalent to your typical Venn Diagram. Basically, given two (or more) sets of data, how much data is in common in both sets?

If Set A contains 1, 2, 3 and 4 and Set B contains 3, 4, 5 and 6, then each set has 3 and 4 in common. Or 50% in common (two data points out of four).

Is there a way to calculate this in Tableau, or at least identify the data that is common to both?