SOLUTION: Beth has the following grades 81%, 88%, 90% 86% on her first four math quizzes. What grade would she need on her next math quiz to have an average of a B (87-90)?
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Question 409072: Beth has the following grades 81%, 88%, 90% 86% on her first four math quizzes. What grade would she need on her next math quiz to have an average of a B (87-90)?
Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
(81+88+90+86+x)/5=87
345+x=87*5
x=435-345
x=>90
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