A student's grade in a college course is determined by the scores of 5 quizzes, a midterm exam, and a final exam. The midterm exam and the final exam both count twice as much as a quiz in determining the student's average grade. If the student averages a score of 80 on the quizzes and scored a 90 on the midterm exam, then what would the student have to score on the final exam to have an overall average grade of 85 for the entire course?
A - 85.5
B - 90
C - 92.5
D - 93.5
E - 95
Answer: C
Source: EMPOWERgmat