463 midterm average will be at least 15 out of 60

Created by JoshuaZ on 2015-10-18; known on 2015-10-19; judged right by JoshuaZ on 2015-10-18.

• JoshuaZ estimated 90% on 2015-10-18
• JoshuaZ   judged this prediction right on 2015-10-18.