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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
79
,
77
, and
91
. What is the minimum score you need on the fourth test to get an B for the course?.



Answer :

facundo3141592

The minimum score you need on the fourth test to get a B is 146.

What is the minimum score you need on the fourth test to get an B for the course?

To get a B, you need to get an average of 80% in all four scores.

The first 3 tests have a total of 100 points, and you got:

79, 77, and 91

So the percentage that you got in these 3 tests is:

79%, 77%, 91%

Now, let's say that X is the percentage you get in the last test, we must have that the average is 80%, then:

(79% + 77% + 91% + X)/4 = 80%

Solving that for x, we will get:

X = 4*80% - $79 - 77% - 91% = 73%

So you need to get at least a 73% of the last test, and that test has 200 points, so you need to get:

P = 0.73*200 = 146

The minimum score you need on the fourth test to get a B is 146.

If you want to learn more about percentages:

https://brainly.com/question/843074

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adioabiola

The minimum score needed on the fourth test to get a B grade for the course is; 153 points.

What is the minimum score required for a B ?

It follows from the task content that the first 3 tests attract 100 points each while the fourth test attracts 200 points. On this note, it follows that the total number of points attainable is; 500 points.

To get 80%, one must get; (80/100) × 500 = 400 points.

Hence, the minimum score needed on the fourth test to get a B is; 400 - 79 - 77 - 91 = 153 points.

Read more on percentages;

https://brainly.com/question/843074

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