Question 789940: To earn an A in a course you must have a final average of at least 90%. On the first examination you have grades of 86%,88%,92%,and 84%. If the final examination counts as two grades,what must you get on the final to earn an A in the course?
Answer by solver91311(24713)   (Show Source):
You can put this solution on YOUR website!
If the final counts as 2 grades and you already have 4, then you have a total of 6 grades at the end. If you need an average of 90 on 6 tests, then you have to get a total of 6 times 90 points. Add up the points you already have, subtract from the product of 6 times 90 to get the total points you need to score for the final. Since the final counts as 2, divide that result by 2 to get the grade required for the final.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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