Re: Probability of getting at least one correct answer, with 2 out of 5 correct optio
Your question has no answer without further assumptions, for instance you seem to assume that the student knows nothing about the question and so will tick boxes at random. Is this realistic?
Originally Posted by jbwtucker
Also there is no decision problem in this, we need some information to make a informed model of how the student decides to tick zero, one or two boxes (or for that matter why not tick more and what marking rule is then applied).