SOLUTION: Luke received grades of 88%, 72% and 82% on the three tests during the semester in a business course. If the final exam counts as two tests, what possible scores on the final exam
Question 1135261: Luke received grades of 88%, 72% and 82% on the three tests during the semester in a business course. If the final exam counts as two tests, what possible scores on the final exam will give him a final average of at least 80%? Found 2 solutions by ikleyn, rothauserc:Answer by ikleyn(52803) (Show Source): You can put this solution on YOUR website! .
>= 80. <<<---=== It is how I understand/interpret the condition.
Or, equivalently,
>= 80
88 + 72 + 82 + 2x >= 400
2x >= 400 - 88 - 72 - 82 = 158
x >= = 79.
Answer. Score under the question is >= 79.
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website! (88 +72 +82 +2x)/5 = 80
:
multiply both sides of = by 5 and simplify
:
242 +2x = 400
:
2x = 158
:
x = 79
:
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final exam score of 79 or greater will give a final average of at least 80%
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