SOLUTION: If I took 5 tests and my average was a 90. What is the lowest test grade I can get on one test?

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Question 735643:
If I took 5 tests and my average was a 90. What is the lowest test grade I can get on one test?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
BY MAXING 4 OF THE 5 TESTS WE GET:
(100+100+100+100+X)/5=90
400+X=5*90
400+X=450
X=450-400
X=50 ANS.