Ram appeared from a competitive exam in which there were 50 questions 3 marks were given for each correct answer and 1 mark was to be deducated for each wrong answer . Ram scored 90 marks . How many questions he attempted were correct and how many were wrong ??
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His attempted questions are 40 and his correct answer were 30 and his wrong answers were 10 and he neglect 10 questions from 50 questions
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