以下是引用nopanicfan在2008-12-8 17:40:00的发言:恭喜LZ~~请问下~ “一个地区的人均XX是用XX的总量除以总人口。已经某地区的XX总量,rounded to the nearest 1,000,000,000 is 43,000,000,000, while the population of this area, when rounded to the nearest 1,000,000 is 860,000,000. Is 人均XX within $5 of $500 in this area?” 这道题目怎么做的什么思路呢.....您的这个解释我不是很理解...
42500,000,000<=total amount<43500,000,000 855,000,000<=population<865,000,000 那么,比率就是介于42500,000,000/865,000,000与43500,000,000/855,000,000之间,exclusive. 然后把这个结果与(495,505)比较,即得。 |