At a certain university, the ratio of the number of teaching assistance to the number of students in any course must always be greater than 3:80. At this university, what is the maximum number of students possible in a course that has 5 teaching assistants?
At a certain university, the ratio of the number of teaching assistance to the number of students in any course must always be greater than 3:80. At this university, what is the maximum number of students possible in a course that has 5 teaching assistants?
请NN讲讲，为什么是133，不是132呢？！。。。
多谢好心NN！！
-- by 会员 Janekw (2011/4/19 5:09:50)
teaching assistance / students >3:80, so (5/x) must be bigger than (3/80), then x<(5*80/3), that is x<133.3 取整数，所以x最大值为133
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发表于 2011-4-19 05:09:50
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