(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?
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?
答
是不是8%?我咋感觉这是个脑筋急转弯呢.
你就假设总共有100人,那么19个没丢鞋子,18个没丢袜子,23个没丢帽子,32个没丢书包,那么假设这四组数据里面的人都不重复,那么就会有19+18+23+32=92个人至少没有丢一样东西,反过来说就是有8个人四样东西全丢了,那么比例就是8%