In a class test containing 15 questions.4 marks are given for every correct answer and -2 marks are given for every incorrect answer. a) Teena attempts all questions, but only10 of her answers are incorrect. What is her total score? b) One of her friends scores -4 marks in this test, though she has got 8 corect answers. How many questions has she attempted incorrectly ?
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Teena got 10 out of 15 so 5 questions are incorrect
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