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来源:百度文库 编辑:高校问答 时间:2024/03/28 22:59:50
There are eight hundred women in a village in Africa. 3% of them wear one ring on their ears. Half the rest wear a pair of rings and the other half have no rings on at all. How many rings are there in all?
告诉我答案!!!

800
24个人戴一个耳环,其余的人一半带2个耳环,一半不带,那么就对于是说其余的人也是一人一个耳环!
所以有800个耳环!
明白了么!

有八百妇女在非洲的一个村庄. 3%的人戴着一环耳. 其余半数戴了一双,另一半就没有了. 问戒指有多少?

戴的人有:
800*3%+800*97%*50%=412

耳环数总计有800

在非洲的一个村庄有八百个妇女. 其中3%的人戴着一只耳环. 剩下的有一半人戴了一双,一半没有戴. 问总共有多少只耳环?
800*3%+800*97%*50%*2=800

800
To suppose that the half wearing a pair of rings give one ring to the other half wearing no rings,then all women in the village will wear one ring.
So the sum of rings should be equal to the sum of women!