Scenario: Quiz was set to have a 100% pass mark. After quiz was started and completed by over 50 students teacher realised that a 100% pass mark was too much and wanted to downgrade the mark to 90% as pass mark.
Resulted that those who had already done quiz but got a 90% pass mark have their quiz still marked as not completed. How can this be rectified? Is it possible or once a pass mark is given and quiz started this cannot be modified?