SOLUTION: ali score 74 82 and 60 for three of his mathematics tests. What is the lowest mark he must score for his fourth test if he aims to achieve an average of at least 78 for the four te

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Question 995602: ali score 74 82 and 60 for three of his mathematics tests. What is the lowest mark he must score for his fourth test if he aims to achieve an average of at least 78 for the four tests?
Answer by phillywily(18) About Me  (Show Source):
You can put this solution on YOUR website!
%26%2365288%3B74%2B82%2B60%2Bx%29%2F4=78
%28216%2Bx%29%2F4=78
216%2Bx=78%2A4
216%2Bx=312
x=312-216
x=96
Hence, Ali must score at least 96 for his fourth test to achieve his goal.