Question 257556
A student scores 75, 86, and 72 on three 100-point exams. If the final is worth 150 points, find the range of final exam score,S, that gives the student an overall percentage of 80% or higher.
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Total # of possible points = 3*100+150 = 450
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80% of 450 = 360
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The student has 75+86+72 = 233 points from the 1st 3 exams.
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Ans: 360-233 <= S <= 150
127 <= S <= 150
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Cheers,
Stan H.