问题描述：
（初二英语智力测试题） 具体地说说为什么!
At a school outing 81℅ of the boys lost a shoe,82℅ of the boys lost a sock,77℅ of the boys a cap and 68℅ of the boys lost a bag.What's the least percentage who lost all 4 things?
At a school outing 81℅ of the boys lost a shoe,82℅ of the boys lost a sock,77℅ of the boys a cap and 68℅ of the boys lost a bag.What's the least percentage who lost all 4 things?
问题解答：
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