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October 8th, 2013, 03:05 PM   #1
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Find score that will most negatively affect a grade

I'm writing a function for a web app that looks at all of a student's scores, and determines the score that if dropped, will give the student the highest possible grade. It's fairly simple to do in a brute-force way by iterating through every combination, but I'm wondering if there is a simpler, mathematical way to determine which one should be dropped. Example scores: 2/3, 3/5, 6/10, 80/100. Total grade is the sum of the numerators divided by the sum of the denominators. Been racking my brains on this one.
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October 8th, 2013, 05:52 PM   #2
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Re: Find score that will most negatively affect a grade

Quote:
Originally Posted by nnielsen
Example scores: 2/3, 3/5, 6/10, 80/100. Total grade is the sum of the numerators divided by the sum of the denominators.
2/3 + 3/5 + 6/10 + 80/100 = 2.67

(2 + 3 + 6 + 80) / (3 + 5 + 10 + 100) = 91/118 = .77

Are you SURE?
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