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) About Me  (Show Source):
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After she takes the fourth test, the sum of her test scores must be greater than or equal to 81 times 4.

John

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