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标题: 1个kaplan上的题目 [打印本页]

作者: tbs    时间: 2002-12-15 23:01     标题: 1个kaplan上的题目

During July, a mail order retailer receive 3300 orders for amounts of less than $100.and 1100 orders for amounts of at least$ 100.what was the average(arithmetic mean) size of an order in July?
1the gross sales from the orders less than $100 equaled the gross sales from the orders greater than $100
2 the orders from the orders greater than $100 amount for a total of $134000 om gross sales.

答案C,我觉得是E,因为没有说等于100的有多少,难道答案错了?
作者: suse    时间: 2002-12-15 23:23

同意E,不知道等于100的多少是不能求出答案




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