If you have previously excluded questions from an exam, it is possible to undo this.
Restoring Excluded Questions:
1. To include questions previously excluded from your class test results page, first log in to your Instructor role, click the Grade Book for your class, and navigate the Test Results for the exam. You need to add the questions back to.
2. Click on the show excluded questions option in the header of the Class Detailed Results section.
3. Uncheck the box next to an excluded question and click the Exclude Questions button to include those questions back into the test results.