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Leslie is taking a math class. This is how the class is graded. Test 1 13% Test 2 13% Test 3 13% Lab 1 10% Lab 2 10% Lab 3 10% Lab 4 10% Final Exam 21%

She received a 93% on Lab 1, 70% on Test 1, 29% on Lab 2, and 50% on Test 2 What must she receive on Lab 3,4,Test #3 and the Final exam in order to have an 80% for the class.

simplylizzy
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  • While I don't think the question is very useful, nor does it show a whole lot of effort, I will say that a simple calculation show that a 96.67% average is needed on the remaining activities, so it might be useful to start working (or to demand extra credit). – Marc Oct 23 '14 at 19:09

1 Answers1

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$$(13\%*70\%) +(13\%*50\%) +(13\%*x) +(10\%*93\%) +(10\%*29\%) +(10\%*x) +(10\%*x) +(21\%*x) = 80\%$$

$$27.8\% + 54\%*x = 80\%$$ $$54\%*x = 52.2\% $$ $$x = 96.67\% $$

AnthonyW
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