Question
There were a total of 80 questions in a Science quiz. 3 marks were awarded for each correct answer and 1 marks were deducted for each wrong answer. Jen answered all the questions and scored 220 marks. How many more correct answers than wrong answers did she answer?
4 m

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There were a total of 80 questions in a Science quiz. 3 marks were awarded for each correct answer and 1 marks were deducted for each wrong answer. Jen answered all the questions and scored 220 marks. How many more correct answers than wrong answers did she answer?