jIn a class test of 20 questions, 5 marks are given for every correct answer, 3 marks are deducted for every incorrect answer and no marks given for questions that are not attempted. Simran scores -3 marks. If she answered 3 questions correctly, how many did she leave unattempted?
Give me this answer with proper explanation like students
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the study of and knowledge about the physical world and natural laws
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6 in correct hejdhjdnid
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