SOLUTION: Rachel has taken three exams in English that were 75%, 92%, 88%. She wants the mean of her 4 English test scores to be at least 82%. What is the minimum score Rachel can earn on th

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Question 512400: Rachel has taken three exams in English that were 75%, 92%, 88%. She wants the mean of her 4 English test scores to be at least 82%. What is the minimum score Rachel can earn on the fourth test to meet her goal?
Answer by Sarah900(12) About Me  (Show Source):
You can put this solution on YOUR website!
To find the mean add all the test scores together and divide by the number of scores. We'll call our unknown test score x.
%28.75%2B.92%2B.88%2Bx%29%2F4≥ .82
%282.55%2Bx%29%2F4≥.82
2.55+x≥3.28
x≥.73