in a class of 30 students, 2 students did not borrow any books from library. 12 students each borrowed 1 book, 10 each borrowed 2 books, and the rest of the students borrowed at least 3 books, if the average number of books borrowed per student was 2, what's the maximum number of books that a single student could have borrow?
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发表于 2009-10-15 16:16:00
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