Let me begin by thanking you for your wonderful tool.

I was wondering if it is possible to adjust the final marking formula of an exam, so I can compensate for guessing in a multiple choice exam. E.g. with a test with 20 true-false questions, 10 questions will be correct 'by chance alone', so I would expect students to at least score 15 correct answers for a passing grade [10 (average correctly guessed answers) + 5 (50% of the remaining questions) = 15]. In the Netherlands a passing grade is 5.5 out of 10.

I have tried using the command \scoringDefaultS and \scoring{SUF....} but I cannot seem to get it to work.

Could somebody help me?

Joost Schalken

### Replies (2)

The final marking formula cannot currently be changed.
Perhaps you can set the questions scoring strategy to get your result, giving appropriate values to m (score for a wrong answer) and b (score for a right answer).
You need a final score equal to 5.5 for 15 right and 5 wrong answers : 15 b + 5 m = 5.5
You need a final score equal to 10 for all right answers : 20 b = 10
So you can try

`\scoringDefaultS{b=0.5,m=-0.4}`

(I'm sorry I did not try it, perhaps you'll have to tweak it).
Note that with this scoring strategy, giving 15 right answers and not responding to others will result to a final score equal to 7.5.