For inputs n and k (in that order), output the number of ways that k objects can be chosen from amongst n distinct objects. [The order of the selected objects is irrelevant.]
For example, suppose you have 4 blocks: red, green, blue, yellow. How many ways are there to select 2 of them? There are 6 ways: RG, RB, RY, GB, GY, BY. [Remember the ordering is irrelevant, so GR is equivalent to RG, and therefore does not count as a distinct choice.]
So, function(4,2) ---> 6.
Solution Stats
Problem Comments
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3 Comments
Sumit Agrawal
on 10 Sep 2013
Why in my pc showing correct but not in this
the cyclist
on 11 Sep 2013
@Sumit, you are probably using a function from a toolbox (e.g. statistics toolbox) that is not available to Cody.
Riccardo Dessì
on 25 Feb 2018
http://onlinestatbook.com/2/probability/permutations.html
Solution Comments
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1 Comment
alexander
on 8 Mar 2017
The test suite throws errors where but I get correct answers when I run.
function y = fcn(n,k)
y = size(combntns(1:n,k),1);
end
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1 Comment
Franck Dernoncourt
on 30 Jan 2012
Let me import my Statistics Toolbox!
;)
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