Hello please forgive my question is not suited for this place, I am not very good at math and I need help.
I have a computer program which is a quiz. As per my plan, each individual quiz question would have a "value" based on the correct/incorrect attempts. After the quiz ends the user gets his simple score (+2 for correct, -0.66 for incorrect and 0 for no attempt) and a comparison based score based on how he performed compared to other students on the platform which would computed using the individual question "value".
I am having a hard time coming up with a formula that assign/update the questions value every time the quiz question is successively attempted by hundreds of users. (each question would have a default score at the beginning).
I seems apparent that a high success question would have a low score, and a low success question would have a high score.