If only the 8 fastest runners advance to the Olympics, how many different ways can the eight fastest runners be chosen from the whole field of 28 runners?
28C8
$${\left({\frac{{\mathtt{28}}{!}}{{\mathtt{8}}{!}{\mathtt{\,\times\,}}({\mathtt{28}}{\mathtt{\,-\,}}{\mathtt{8}}){!}}}\right)} = {\mathtt{3\,108\,105}}$$
+8 
