Question

Going into the final exam, which will count as two tests, Isabella has test scores of 77, 80, 74, 65, and 92. What score does Isabella need on the final in order to have an average score of 80?

Isabella needs a score of

Answer 1

Total number of test: 5 finished test + 2 (final exam) = 7 total exams

Isabella needed total score: 80 (average) ×7 (no. of test) = 560

Present total score: 77 + 80 + 74 + 65 + 92 = 388

Isabella's Final Test needed Score: 560 - 388 = 172

Final Answer: 172