SOLUTION: A student has scores of 67.25, 66.75, and 72.5 on his first three tests. He needs an average of at least 70 to earn a grade of C. What is the minimum score that the student needs o
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Question 152298: A student has scores of 67.25, 66.75, and 72.5 on his first three tests. He needs an average of at least 70 to earn a grade of C. What is the minimum score that the student needs on the fourth test to ensure a C?
Answer by oscargut(2103) (Show Source): You can put this solution on YOUR website!
(67.25+66.75+72.5+x)/4>=70
206.5+x>=280
x>=73.5
Answer: 73.5 or more
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