a final examination score in General maths is weighted four times as much as each test score If the student has a final exam score of 87% and test grades of 70% and 92%, then the mean score is
85%
If the final = four regular exams:
Mean = ∑x/n = ((87*4) + 70 + 92)/6 = ?
Got it!
To find the mean score, you need to calculate the weighted average of the final exam score and the two test grades.
Since the final exam score is weighted four times as much as each test score, we can assign weights accordingly:
Weight of the final exam score = 4
Weight of each test score = 1
Let's calculate the weighted average:
Weighted average = (weight of final exam score * final exam score + weight of first test score * first test score + weight of second test score * second test score) / (total weight)
Weighted average = (4 * 87 + 1 * 70 + 1 * 92) / (4 + 1 + 1)
Weighted average = (348 + 70 + 92) / 6
Weighted average = 510 / 6
Weighted average = 85
Therefore, the mean score is 85.