Concept explainers
In order to earn an A in a class, your test scores must average at least
On the first 6 tests, you have an average of
What score do you need to get on the last test to earn an A? Show your work.
To find : the score that is needed to get on the last test to earn an A.
Answer to Problem 7STP
98%
Explanation of Solution
Given information: In order to earn A in a class, the average of test scores must be atleast 92%.On the first 6 tests , average of score is 91% .
Calculation:
The average score of first 6 tests is 91%
We know that average score is ratio of sum of scores in all test to the number of test.
Therefore, sum of score in first 6 tests= 6
Let the score obtained in last test be x.
Then average of score in all 7 test =
Now, to earn an A in class, the average of test scores must be atleast 92%.
Therefore, to earn an A in class
Thus, the score that is needed to get on the last test to earn an A is 98%
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