Question 355507: Hi, I am trying to figure out how combinations/groupings work. If you could give me the steps on how to do it, I would greatly appreciate it.
Thank You, Jordan
Answer by sudhanshu_kmr(1152)   (Show Source):
You can put this solution on YOUR website! To solve grouping problems we use combination.
no. of ways to select r items from total n = nCr = n!/ [ r! * (n-r)!]
for example -
no. of ways to select 2 people from 10 = 10C2 = 45
we use combination where problem is related to only grouping of items,
arrangement is not considered.
for example- no. of ways to select 3 persons from total 5 names A,B, C, D and E
here ABC, CBA and BAC are same, these form only one group.
If your concept have not been cleared, you are welcome for further help
please feel free to contact.....
sudhanshu.cochin@gmail.com , sudhanshu.cochin@yahoo.com
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