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In an examination, a student scores 4 marks for every correct answer and loses 1 mark for every wrong answer. If he attempts all 60 questions and secures 130 marks, the no of questions he attempts correctly is :

Correct Answer: 38

Explanation:

Let the number of correct answers be X.


Number of incorrect answers = (60 – X).


4x – (60 – x) = 130


=> 5x = 190 


=> x = 38


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