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July 4, 2015

Homework Help: Pre Algebra

Posted by Ry on Thursday, October 17, 2013 at 8:58pm.

In Wilbur's math class, his grade is based on the average score of six tests, each worth 100 points. Wilbur always worries about his grade. He knows that his average on the first four tests is 88.5. What is the lowest average he could get on his next two tests and still average 90 overall?

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