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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 75 question and secures 125 marks, the number of question he attempted correctly, is – (1) 35 (2) 40 (3) 42 (4) 46 |
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Answer» Correct option is (2) 40 Let correct = x Incorrect = y ∴ x + y = 75 4x – y = 125 ⇒ x = 40 |
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