SOLUTION: In an examination, a student scores 5 marks for every correct answer and loses 2 marks for every incorrect answer. A student attempts 75 questions and scores 165 marks. How many qu

Question 1041651: In an examination, a student scores 5 marks for every correct answer and loses 2 marks for every incorrect answer. A student attempts 75 questions and scores 165 marks. How many questions did he answer correctly?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the number of correct answers
= the number of incorrect answers
------------------------

and

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He answered 45 questions correctly
--------------------------------
check:

OK
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