SOLUTION: Ivanna has scored 80,80,and 72 on her previous three tests. What score does she need on her next test so that her average (mean) is 81 ?
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Question 774293: Ivanna has scored 80,80,and 72 on her previous three tests. What score does she need on her next test so that her average (mean) is 81 ?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
After she takes the fourth test, the sum of her test scores must be greater than or equal to 81 times 4.
John
Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it
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