A student's final grade is determined by four components: Homework (20%), Quizzes (20%), Midterm (30%), and Final Exam (30%). If the student scored 85 on Homework, 70 on Quizzes, 90 on the Midterm, and 80 on the Final Exam, what is their overall final grade?
✓ Correct Answer: Option C
Calculate the weighted average: (0.20 * 85) + (0.20 * 70) + (0.30 * 90) + (0.30 * 80) = 17 + 14 + 27 + 24 = 82.0.