How do I write this problem?
to receive a grade B- in a math course, you must have a mean of 83 on five tests (4 tests + one final) all 100 pts maximum each. Your scores thus far are 85,79,82,and 81. How many points must you have on the final, to earn the B-? write down your work..
0.83 * 500 = 415
You need a total of 415 points.
Your test grades so far = 327
415 = 327 = 88
You need at least a score of 88 on the final.
thank you ms. Sue.. the four scores threw me off and wasn't sure how to start the formula or problem
You're welcome.
I just noticed that I have a typo:
415 - 327 = 88
thank you you are a life saver
To solve this problem, you need to find out how many points you need on the final test in order to achieve a mean of 83 for all five tests.
Here's how to approach it:
1. Determine the total points earned on the first four tests. Add together the scores you have so far: 85 + 79 + 82 + 81 = 327.
2. Calculate the total number of points possible for the first four tests. Since each test is out of 100 points, the maximum possible score for all four tests is 400.
3. Find the difference between the mean score desired (83) and the current total points earned (327). Subtract 327 from 83: 83 - 327 = -244.
4. Determine the maximum points possible for the final exam. Since it is also out of 100 points, the maximum possible score for the final exam is 100.
5. Subtract the difference calculated in step 3 from the maximum points possible for the final exam. Subtract -244 from 100: 100 - (-244) = 100 + 244 = 344.
Therefore, you need to score at least 344 points on the final exam to earn a B- in the math course.
In summary:
To receive a grade B-, you must have a mean of 83 on all five tests. With four tests completed and scores of 85, 79, 82, and 81, you have earned a total of 327 points so far. The difference between the mean desired and the current total points is -244. The maximum possible score on the final exam is 100, so subtracting the difference from the maximum points gives a required score of 344 on the final exam.