难题300一道PS题求助，谢谢各位祝大家早日分手

entertaininguse · 发表于 2019-11-27 20:52:39

King School has an enrollment of 900 students. The school day consists of 6 class periods during which each class is taught by one teacher. There are 30 students per class. Each teacher teaches a class during 5 of the 6 class periods and has one class period free. No students have a free class period. How many teachers does the school have?

答案是36

elisewu · 发表于 2019-11-28 00:07:18

我的理解不知道對不對哈。900人，一個class30個人，這樣就有30個class。一天有6節課，也就是一天下來對老師來說需要上6*30=180節課。每個老師是教5節課，那個n個老師就是5n節課，因為不教滿6節，所以是5n。也就是所有老師教的課數要等於每天30個class，每個class 6節課的總數，即 180=5n，最後求得老師數為36

难题300一道PS题求助，谢谢各位祝大家早日分手

所属分类: GMAT考试

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