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A test score of "90" represents the percentage of correct questions. Multiply this percentage by the total number of questions and you will have the number of questions correctly answered. Subtract this from the total to find answers wrong. 90% of 40 questions = .90 x 40 = 36 questions right. 40-36 = 4 answers wrong.

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โˆ™ 2009-04-08 09:25:05
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Algebra

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Q: You got 90 on a test that has exactly 40 questions how many questions did you get wrong?
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