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OpenStudy (anonymous):
claire has received scores of 85, 88, 87, and 85 on her tests. to have an overall score of at least 88 what must she score on her fifth test?
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OpenStudy (amistre64):
\[\frac{old.sum+new}{(4+1)tests}=88\] \[old.sum+new=88(5.tests)\] \[new=88(5)-old.sum\]
OpenStudy (anonymous):
so i'm getting 86.6...?
OpenStudy (amistre64):
new = 88(5)-345 so i doubt its a decimal
OpenStudy (amistre64):
id say 95
OpenStudy (anonymous):
aaah, got it! yep 95!
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