A student loses a mark for every wrong answer and scores 2 marks for every correct answer.If he answers all the 60 questions in an exam and scores 39 marks,how many of them were correct?

1. A student loses a mark for every wrong answer and scores 2 marks for every correct answer.If he answers all the 60 questions in an exam and scores 39 marks,how many of them were correct?

[BKB Senior Officer-2012 : 2012]

1. 31

2. 37

3. 33

4. 27

Answer

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