Multiple Pre-Checks Followed by Mastery Test

There are a couple of options: 

• Put the questions from the three pre-tests into one big Pre-Check. Use the Results slide as the Pre-Check for tracking. 

or 

• Create a Results of Results slide that "scores" the Results slide of the three pre-tests. Use the Results of Results as the Pre-Check for tracking. [Note: I haven't tested this in an LMS/LRS. But Storyline lets me use these settings, so I'm assuming it will work.]

For future reference: 

A Results slide can be set to "score" the info from other Results slides.

A Results slide can be marked as a Knowledge Check (no tracking), a Pre-Check, or a Final Assessment. 

When publishing for an LMS/LRS, if a tracked Pre-Check is passed, the course is marked as complete. Otherwise, the tracking will be based on the first Final Assessment that is completed.