Question
A student gets +3 marks for each right answer and - 0.5 mark for each wrong answer in an exam, which consists 250 question. If the student gets 477 exam marks, find the number of wrong questions attempted by him?
Right answer : wrong answer = 86 : 39 ∴ Number of wrong questions attempted = 39/(86+39) × 250 = 78 More Alligation Questions
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