Ans: A
The required queue
The required queue
$\begin{array}{cl}
= & 5! \times 6! \\
= & 86\ 400
\end{array}$
Resources for HKDSE Mathematics
Resources for HKDSE Mathematics
$\begin{array}{cl}
= & 5! \times 6! \\
= & 86\ 400
\end{array}$
