Mona wrote 7 tests, and her test average is 93. There will be one more test before the end of the year. What is the lowest grade that Mona can get for her last test so that her test average is 90 or more?
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The lowest grade that Mona can get for her last test would be 69.
Step-by-step explanation:
Mona wrote 7 tests, and her test average is 93.
Her total grades in all 7 tests = 93 × 7 = 651
There will be one more test,
To calculate the new average, calculate the total grades after 8th test
= 8 × 90
= 720
Mona needs grades in her 8th test = 720 - 651 = 69
The lowest grade that Mona can get for her last test would be 69.
Learn more about average : https://brainly.in/question/13319942
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