SOLUTION: Determining a Necessary Grade: A mean average of 80 or greater for five exams is needed for a final grade of B. Jorge Rivera's first four exam grades are 73, 69, 85, and 80. What g

SOLUTION: Determining a Necessary Grade: A mean average of 80 or greater for five exams is needed for a final grade of B. Jorge Rivera's first four exam grades are 73, 69, 85, and 80. What g

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Question 130778: Determining a Necessary Grade: A mean average of 80 or greater for five exams is needed for a final grade of B. Jorge Rivera's first four exam grades are 73, 69, 85, and 80. What grade does Jorge need on the fifth exam to get a B in the course?
Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
(73+69+85+80+x)/5>=80
(307+x)/5>=80 now cross multiply.
307+x>=5*80
307+x>=400
x>=400-307
x>=93 is the score needed to maintian an 80 average.
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