I wonder if I get this right. If you have a multiple choice quiz - then all correct answersd have to sum up to 100% Is that right? Or can they sum up to more?
For incorrect answers you have to use a negative grade. Becaise if you choose none - then 0% will be added and then checking all alternatives will always be correct - if the correct answrts sum up to 100% - did I get that right also?