Question 704507: how many ways can 3 kids be selected from 12?
Answer by jim_thompson5910(35256)   (Show Source):
You can put this solution on YOUR website! There are 12 ways to choose the first kid
There are 12-1 = 11 ways to choose the next kid (assuming the first kid can't be placed back in the mix and potentially chosen again)
There are 12-2 = 10 ways to choose the third kid.
So there are 12*11*10 = 1320 different ways to choose 3 kids where order matters.
If order does not matter, then you'll have to divide by 6 because there are 3! = 6 ways to arrange any particular group. So if order does not matter, then there are 1320/6 = 220 different ways.
Summary:
If order does matter, then there are 1320 different ways
If order does NOT matter, then there are 220 different ways
--------------------------------------------------------------------------------------------------------------
If you need more help, you can email me at jim_thompson5910@hotmail.com
To find other ways to contact me, you can also visit my website: http://www.freewebs.com/jimthompson5910/home.html
Thanks,
Jim
--------------------------------------------------------------------------------------------------------------
|
|
|
