Overlap Count Measure

Thank you so much Ashish_Mathur  and lbendlin. I have uploaded the sample data as a table here. So, I am trying to recreate what a Venn diagram would do. Below I show the result I expect as a screenshot. By choosing 2 different months in the slicers, the red box should display the number of names that appear in both months as selected in the slicers. I am able to get the green boxes right. It's the red one that is an issue. So far I have found that if I duplicate the 'Names' table and use the 'month' fields from 2 different tables for the month-slicers then the red box gives me the correct output. I'd like to know if I can acheive the same result without duplicating the table. Thank you. FYI - I have pasted the DAX code for the 'overlap measure' in my earlier post.