Homework Help: math

Posted by sonia on Tuesday, September 6, 2011 at 11:40am.

Paul has grades of 73 and 86 on his first two tests. What must he score on his third test in order to have an average of at least 70?

math - PsyDAG, Tuesday, September 6, 2011 at 12:13pm
Mean = sum of scores/number of scores

70 = (73+86+x)/3

Solve for x.

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