[解題] 高一數學 排列組合之渡河
1.年級:高一
2.科目:數學
3.章節:排列組合QQ
4.題目:有三艘船,一艘船最多只能搭乘五人,有十二人欲渡河,請問有幾種方式?
5.想法:
因為十二人用扣的會很驚人:(
所以我把它分批處理。
想成三種情形:
(2,5,5) =C12取2 x C10取5 x 3
(3,4,5) =C12取3 x C9取4 x 3!
(4,4,4) =C12取4 x C8取4
但是!我覺得沒有這麼簡單!!這一定有重覆的!!
想請大家幫忙集思廣益一下,這到底重覆在哪裡哭哭哭
謝謝:)
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