Question
There were a total of 30 questions in a Science quiz. 6 marks were awarded for each correct answer and 3 marks were deducted for each wrong answer. Esther answered all the questions and scored 135 marks. How many more correct answers than wrong answers did she answer?
4 m

Click button first when a symbol is required. X

There were a total of 30 questions in a Science quiz. 6 marks were awarded for each correct answer and 3 marks were deducted for each wrong answer. Esther answered all the questions and scored 135 marks. How many more correct answers than wrong answers did she answer?