数学题!!99我(英文要好)!!!!另外一题
4.(a) Heigh-ho, heigh- ho! The Swven Dwarves are off to work. Each daytheywork in four"teams"- at least one of which inevitably contains just on Dwarf! Their goalis tosplit up each day in a new way. For how many days can they keep thisup?(b)Suppose Snow White joins them, but they still work in four teams.For howlong can they split up in a new way each day?
参考答案:题目大意七个小矮人每天工作分成四组,每组最少一人,每天的分法要不一样,他们这样可以干多少天
第二问是加上白雪公主,就是八个人工作,也分四组,和上一题一样
此题为排列组合题目
第一问105+210+35=350天
可分为2221 3211 4111三种情况
第二问420+840+280+420+56=2016天
可分为2222 3221 3311 4211 5111五种情况
够清楚了吧