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Mathematics, 02.07.2019 08:00 lcdavis16

At a certain middle school, the 6th-grade class of 390 increased by 10%, the 7th grade class of 350 increased by 22%, and the 8th grade class of 420 increased by 20%. overall, what was the percentage increase of students for this middle school? express your answer to the nearest tenth.

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At a certain middle school, the 6th-grade class of 390 increased by 10%, the 7th grade class of 350...
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