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Sana participated in a two-round TV quiz.In the first round she answered 10 questions.She received 4 points for each correct answer and lost a point for each incorrect answer.Sana needed more than twenty points to participate in the second round.What is the least number of questions that Sana had to answer correctly in order to qualify for the second round ? |
| For 7 correct answers she will score 28 marks. and for 3 incorrect answers she will get 28 - 3 = 25 marks. |
