SOLUTION: Jenny has scored 78,64,69, 78, and 86 on her previous five tests. What score does she need on her next test so that her average (mean) is 77 ?
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Question 749337: Jenny has scored 78,64,69, 78, and 86 on her previous five tests. What score does she need on her next test so that her average (mean) is 77 ?
Answer by Cromlix(4381) (Show Source): You can put this solution on YOUR website!
The total of Jenny's 5 tests = 375
If she wants an average of 77 then
her 6 tests must total 6 x 77 = 462
462 - 375 = 87 which is what Jenny
must score on the sixth test for an
average of 77.
:-)
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