SOLUTION: I have a percent 91% on first test and 87% on second test and 86% on third test what average percent should I receive of the fourth and fifth test to receive a 95%

Algebra ->  Average -> SOLUTION: I have a percent 91% on first test and 87% on second test and 86% on third test what average percent should I receive of the fourth and fifth test to receive a 95%      Log On


   



Question 387522: I have a percent 91% on first test and 87% on second test and 86% on third test what average percent should I receive of the fourth and fifth test to receive a 95%
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let the grades on the 4th and 5th tests = a and b
The problem wants to know what is %28a+%2B+b%29%2F2
given:
%2891+%2B+87+%2B+86+%2B+a+%2B+b%29%2F5+=+95
264+%2B+a+%2B+b+=+5%2A95
a+%2B+b+=+475+-+264
a+%2B+b+=+211
%28a+%2B+b%29%2F2+=+105.5
It looks like you can't average 95% for the 5 tests, because
then you would need to get better than 100% on the 4th and 5th tests