Maths2
2007-03-08 5:00 am
A university is doing a research on family pianning in Hong Kong.In Mongkok,120 families have been interviewed.Among which,15﹪ want to have two or more children.In Yuen Long,200families have been interviewed and 35% of them want to have two or more children.What percentage of the interviewed families want to have two or more childenin these two districts?
回答 (1)
2007-03-08 5:10 am
✔ 最佳答案
120x15/100+200x35/100= 88families
88/(120+200)*100%
=27.5%
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070307000051KK03767