For $n$ different objects, if we have a queue of all $n$ objects, then the number of queue is
\begin{equation*}
n!=n\times(n-1)\times(n-2)\times\cdots\times2\times1
\end{equation*}
Resources for HKDSE Mathematics
Resources for HKDSE Mathematics
For $n$ different objects, if we have a queue of all $n$ objects, then the number of queue is
\begin{equation*}
n!=n\times(n-1)\times(n-2)\times\cdots\times2\times1
\end{equation*}
