In a competitive examination, there were 60 questions.the correct answer would carry 2 marks, and for incorrect answer 1 mark would be subtracted.yashwant had attempted all the questions and he got total 90 marks. Then how many question he got wrong.
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Let a be the number of questions he got correct. The made 60-a wrong answers
So 2a-(60-a) =90
By solving we get a=50
So number of wrong answers are 10
So 2a-(60-a) =90
By solving we get a=50
So number of wrong answers are 10
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