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Question 341727: Suppose that you are taking a course that has 4 tests. The first three tests are for 100 points each and the fourth test is for 200 points. To get an B in the course, you must have an average of at least 80 percent on the 4 tests. Your scores on the first 3 tests were 77, 80, and 80. What is the minimum score you need on the fourth test to get an B for the course?
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Suppose that you are taking a course that has 4 tests. The first three tests are for 100 points each and the fourth test is for 200 points. To get an B in the course, you must have an average of at least 80 percent on the 4 tests. Your scores on the first 3 tests were 77, 80, and 80. What is the minimum score you need on the fourth test to get an B for the course?
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500 points are offered in the 4 tests
0.8*500 = 400
Equation:
77+80+80+2x >=400
237+2x >= 400
2x >= 163
x >= 81.5 (score needed on the 4th test)
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Cheers,
Stan H.
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