The question is about expected value. The answer suggests to multiply each outcome contribution by its probability. But in this case we also multiply costs (Contrib=Sales-Costs), however, costs look as they are fixed. The company needs to pay rent for rooms, so I think rent is fixed and does not depend on possible outcome. How’s right?
Please, you must be a little bit more patient. You posted your request little time before the exam day.Moreover most of students have further exams so can’t really sacrifice the time.