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DS: Store S sold a total of 90 copies of a certain book during the seven days of last week,and it sold different numbers of copies on any two of the days, If for the seven days Store S sold the greatest number of copies on Saturday and the second greatest number of copies on Friday, did Store S sell more than 11 copies on Friday?
1) Last week Store S sold 8 copies of the book on Thursday. 2) Last week Store S sold 38 copies of the book on Saturday.
[此贴子已经被作者于2009/7/20 14:58:52编辑过] |