Article
Summary:
This article describes how to derive the number of ways in which $n$ identical objects can be located in $r$ boxes.
References:
[1] Calda, E., Dupač, V.: Kombinatorika, pravděpodobnost, statistika (Matematika pro gymnázia). Prometheus, Praha, 2008.
[2] Vilenkin, N. J.:
Kombinatorika. SNTL, Praha, 1977.
MR 0462956