Question

final grade an instructor gives four 1-hour exams and one final exam, which counts as three 1-hour exams. find a student’s grade if she received 67, 75, 99, and 87 on the 1-hour exams and 85 on the final exam. round your answer to one decimal place if necessary. the student’s final average is \boxed{}

Explanation:

Step1: Determine total weight

The four 1-hour exams and the final (counts as 3) give total "exam units" as \(4 + 3=7\).

Step2: Calculate total score

For 1-hour exams: \(67 + 75+99 + 87 = 328\). For final: \(85\times3 = 255\). Total score: \(328+255 = 583\).

Step3: Compute average

Average \(=\frac{583}{7}\approx83.3\) (rounded to one decimal).

Answer:

\(83.3\)