SOLUTION: A student loses 3 marks for every wrong answer and scores 2 marks for every correct answer. if he does all the 50 questions in an examination and scores 65 marks, how many of them

Question 1045128: A student loses 3 marks for every wrong answer and scores 2 marks for every correct answer. if he does all the 50 questions in an examination and scores 65 marks, how many of them were correct? (please explain the method)
Answer by KMST(5328) (Show Source): You can put this solution on YOUR website!
= number of correct answers
Since the student answered all questions in the examination,
= number of wrong answers.
If the student loses marks for every wrong answer and scores marks for every correct answer,
his score would be calculated as
.
Since his score was ,
.

Solving:

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