Among nine orchids for a line of orchids along one wall, three are white, four lavender, and two yellow. How many color displays are there?
The number of different color displays is
$$
\left(\begin{array}{c}
9 \\
3,4,2
\end{array}\right)=\frac{9 !}{3 ! 4 ! 2 !}=1260
$$
