HHC 2015 RPN programming Contest is now open

[Jeff O.]

(10-14-2015 07:01 PM)Thomas Klemm Wrote:  You are correct: Number of combinations with repetition
\[
\binom{n+k−1}{k}=\binom{6+5−1}{5}=\binom{10}{5}=252
\]
Cheers
Thomas

Thanks for the information, and for not telling me to "RTFI" (Read the Fine Internet). :-)

I guess I forgot that it is 2015 and all I had to do was type "combination" into a search engine. It is too easy to rely on the expertise that I know resides in the members of this Forum.