Mathematics, 24.07.2021 08:00 emokid7822

In an IQ test, 4 marks are given for every correct answer and 2 marks are deducted for every wrong answer. If Crystal answered 30 questions and scored 84 marks, how many of her answer were correct?

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In an IQ test, 4 marks are given for every correct answer and 2 marks are deducted for every wrong a...