I have 16 questions in an exam that chooses 3 questions at random each time the exam is presented. How many times must the exam be taken in order to compile 10 responses for each question? Tried to search for an answer but kept getting an error.
I am working on a past exam question and I am not so sure whether or not my answer is correct. If anybody could give me any guidance i would be most appreciated. I have attached the question and my solution in a jpeg file.