The minimum score that you can make on the last test and earn a B will be greater than or equal to 74.
What is Mean?
The mean is the straightforward meaning of the normal of a lot of numbers. In measurements, one of the markers of focal propensity is the mean. The normal is alluded to as the number-crunching mean. It's the proportion of the number of genuine perceptions to the absolute number of perceptions.
In your economics 101 class, you have scores of 68, 82, 87, and 89 on the first four of five tests to earn a grade of a B or higher the average of the first five test scores must be greater than or equal to 80.
Let x be the score of the fifth test. Then we have
The minimum score that you can make on the last test and earn a B will be
80 ≤ (x + 68 + 82 + 87 + 89) / 5
400 ≤ x + 326
x ≥ 400 - 326
x ≥ 74
The minimum score that you can make on the last test and earn a B will be greater than or equal to 74.
More about the mean link is given below.
https://brainly.com/question/521501
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