Add support for n of m correct answers in multiple choice questions
E.g., there are 8 options presented with 4 being correct, select 3 correct options.
spec:
Submitted by Elmer van Chastelet on 14 November 2016 at 13:34
- when one incorrect answer is selected –> grade is 0.0
- when
n =< correct answersare selected –> grade 10.0- when
< n correct answersare selected –> grade 0.0