Based on your previous question and this follow-up, it sounds like you want to count users who did both event A and event B (i.e., an intersection/AND condition).
The best way to do this in Mixpanel is with a Cohort. You can define a cohort in the Cohort Builder with conditions like:
User did Event A AND User did Event B
This will give you only the users who performed both events. [Cohorts]
Once you've created that cohort, you can use it as a filter in your Insights report to analyze only those users.
Here's a quick summary of your options:
| Goal | Approach |
| - | - |
| Count A + B (total, may double-count) | Formula A+B in Insights |
| Count users who did A or B (no double-counting) | Custom Event (A OR B) |
| Count users who did both A and B | Cohort with AND condition |
The knowledge sources do not explicitly describe a direct formula approach for an AND intersection count, so using a Cohort filter is the recommended path for your use case.
