Question
Tiffany participated in one Maths exam. There were 21 questions in the exam. She scored 2 points for every question answered correctly. However, 1 points would be deducted for every question answered wrongly. How many questions did Tiffany answer correctly if she scored 33 points?
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Tiffany participated in one Maths exam. There were 21 questions in the exam. She scored 2 points for every question answered correctly. However, 1 points would be deducted for every question answered wrongly. How many questions did Tiffany answer correctly if she scored 33 points?