加分題 5之詳解

 
進階教學(5)-組成四位數


在  0, 1, 1, 1, 2, 2, 2, 3, 3, 4, 5, 6  這12個數字之中，選 4個數字出來，可以排成_________個四位數。

  

分類

舉例

組合數

排列數

三同一異

1110

2

2×3=6

1112

2×5

10×4=40

二同二同

1122

3

3×6=18

二同二異

1120

3×5

15*9=135

1123

3×10

30×12=360

四異

1230

20

20×18=360

1234

15

15×24=360

總計

 

 

1279

 

                                                 

Date Posted: 29 Apr 2013 @ 01 04 PM
Last Modified: 22 May 2013 @ 02 24 PM
Posted By: 我是大富翁
 E-mail | Permalink
 

Responses to this post » (None)

 


Comments are open. Feel free to leave a comment below.


Comment Meta:
RSS Feed for comments
 

Leave A Comment ...

 

XHTML:
You can use these tags: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>
\/ More Options ...
Last 50 Posts
Register an account
Change Theme...
  • Role »
  • Posts »
  • Comments »
Change Theme...
  • VoidVoid (Default)
  • LifeLife
  • EarthEarth
  • WindWind
  • WaterWater
  • FireFire
  • LiteLightweight
  • No Child Pages...
  • No Child Pages...
  • No Child Pages...