imcute,

1. Use appropriate case when you answer.

2. Avoid abbreviations like btw, ty etc.

Oh ok.

]]>1. Use appropriate case when you answer.

2. Avoid abbreviations like btw, ty etc.

first,the reason of why the binomial coeffeicents are related to permutations:

bc its like having n options and asking the probability of m options chosen

expanding is just permutating

tldr:if binomial coeffecients fit on a bidimensional graph,then trinomial ones fit on a tridimensional graph(i.e pyramid)]]>