SOLUTION: A student has an average of 72% in 9 tests that she wrote. She still needs to write one more test and wants to achieve a total average of 75%. What percentage must she get for the

Question 768660: A student has an average of 72% in 9 tests that she wrote. She still needs to write one more test and wants to achieve a total average of 75%. What percentage must she get for the last teste?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
A student has an average of 72% in 9 tests that she wrote.
She still needs to write one more test and wants to achieve a total average of 75%.
What percentage must she get for the last test?
:
Let x = the grade of the last test
:
The last test is only 10% of the total grade, therefore
= 75
648 + x = 750
x = 750 - 648
x = !02% so it may not be possible
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