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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 questions and secure 125 marks, the number of questions be attempted correctly, is |
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Answer» ong>Answer: 40 Step-by-step EXPLANATION: If the NUMBER of correct answer be X, then the number of incorrect answer is (75x). ∴4x−(75−x)=125orx=40 |
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