加分題 3之詳解

 
進階教學(3)-渡河安排

8人搭三船(船不同)，每船限搭5人，求安全過江的方法有___種


 
(詳解):

 

所有

 

扣掉下列情形:

 

(1)8人同船，有 3 種

(2)7人一船、1人一船

(3)6人一船、2人一船

(4)6人一船、1人一船，另1人一船，有

 

得答=6561- 3 - 48 - 168 - 168=6174

Date Posted: 28 Apr 2013 @ 11 12 PM
Last Modified: 28 May 2013 @ 01 59 AM
Posted By: 我是大富翁
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