Loral received all her grades for the semester (in parentheses) along with the weight for each grade, shown below.
Weight 45% = 3 tests (80%, 75%, 92%) 25% = final (88%) 15% = paper (91%) 15% = 2 oral quizzes each worth 25 points (22, 19)
What is her final grade?
Answer(s): A
Explanation:
Calculate the weighted average of the 3 tests:
(80 + 75 + 92) / 3 = 82.3;
Calculate the average of the 2 oral quizzes:
(22/25) ×100 = 88 and (19/25) × 100 = 76, so (88 + 76) / 2 = 82.
Multiply each grade by their weight, and then add them all up to determine the final grade:
(82 × 0.45) + (88 × 0.25) + (91 × 0.15) + (82 × 0.15) = 85.