Question: Dr. B. A. Yes has been teaching basic statistics for many years. He knows that 80 percent of the students will complete the assigned problems. He has also determined that among those who do complete the assignments, 90 percent will pass the course. Among those students who do not complete their assignments, 50 percent will pass. Mike Fishbone took statistics last semester from Dr. Yes and received a passing grade. What is the probability he completed the assignments?