SOLUTION: An exam has 20 questions. It is scored by giving 10 points for each correct answer and deducting 5 points for every incorrect answer. If you answer all 20 questions and score 125 p

Question 287832: An exam has 20 questions. It is scored by giving 10 points for each correct answer and deducting 5 points for every incorrect answer. If you answer all 20 questions and score 125 points, how questions did you answer correctly?
a) 15 b) 16 c) 14 d) 11 e) 12
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = number of correct answers
Then = number of incorrect answers
given:

I answered 15 questions correctly
check:

OK
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