SOLUTION: Tammy has scored 79 ,89 ,91 , and 60 on her previous four tests. What score does she need on her next test so that her average (mean) is 77?
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Question 680394: Tammy has scored 79 ,89 ,91 , and 60 on her previous four tests. What score does she need on her next test so that her average (mean) is 77?
Answer by ReadingBoosters(3246) (Show Source): You can put this solution on YOUR website!
...
...
319+x = 5(77)
319 + x = 385
x = 385 - 319
on the next test
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