问题:

百分数数学题,懂英语和数学的来!thereare900studentsinaschool,and405ofthemareboys.Also,60%ofthestudentsareinjuniorforms,and306ofthemaregirls.(a)Whatpercentageofthestudentsaregirlsintheschool?(b)Whatper

更新时间:2024-04-28 10:48:04

问题描述:

沈龙回答:

  (a)(900-405)/900=55%

  (b)(900-405-306)/(900*40%)=52.5%

  (c)900*40%*(1-52.5%)=171

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