on 3 tests you earned grades of 88%,94%,and 90%. Each test was worth 150points. The final exam is worth 250 points. How many points do u need on the final exam to earn 93% of the total points on tests? What percent do you need on the final?
243/250 = 97.2% needed on final exam
Let's figure the total number of points you've earned.
0.88 * 150 = 132
0.94 * 150 = 141
0.9 * 150 = 135
Total points = 408
450 + 250 = 700 points possible
0.93 * 700 = 651 points you need to have an over all average of 93%
651 - 408 = 243 points needed on the final exam
To find out how many points you need on the final exam to earn 93% of the total points on tests, we can start by calculating the total points earned on the three tests.
First, add up the grades earned on the three tests: 88% + 94% + 90% = 272%.
Since each test is worth 150 points, the total points earned on the three tests can be found by multiplying the total percentage earned (272%) by the total points available (450 points):
Total points earned on tests = (272% / 100%) * 450 points = 1224 points.
To calculate how many points you need on the final exam to earn 93% of the total points on tests, subtract the total points earned on tests from the total points available (250 points):
Points needed on the final exam = 93% * (450 + 250 points) - 1224 points = 674.5 - 1224 points = -549.5 points.
However, it is not possible to earn negative points. This means that it is not possible to earn 93% of the total points on the tests.