## Math 461 Midterm Exam 3 solutions, results, and grading information

### Exam 3 information

• Exam 3 Syllabus. The exam information/syllabus page posted before the exam.
• Exam 3 Solutions. Complete solutions, with score breakdown per subproblem, and detailed comments on incorrect approaches and common mistakes. Check here first before asking questions about the exam.
• Score breakdown: The maximal score was 150 points (not including the extracredit question, which was worth an additional 10 points). Each subproblem was worth 10 points, except for Problem 4, which was worth 8+8+9+15=40 points for the four parts (a)--(d). The true/false questions in part (d) of Problem 4 were scored as explained on the exam sheet: 3 points for a correct answer, 0 points for an answer left blank, -2 points for an incorrect answer. Thus, if you randomly guessed T or F on each of the 5 questions, your expected score on that part would be 5 points.
• Exam statistics: Scores ranged from 160 (150 points from the regular problems, plus 10 extracredit points) to the low 20s. 10 percent had a score of 150 or better, 20 percent had a score of 135 and higher, while 10 percent had a score below 40. The median score was 103.
Deadline: The deadline for appeals on Exam 3 is Wednesday, May 6. (The exam will be returned Monday, May 4.)