<p align="center"><img src="https://pimg.1px.tw/pcw9478/1378825953-901901659.jpg"/><br><br></p><br><p align="center"><a id="irc_hol" class="irc_itl" href="http://www.google.com.tw/url?sa=i&rct=j&q=%E5%AE%98%E5%85%B5%E6%8D%89%E5%BC%B7%E7%9B%9C&source=images&cd=&cad=rja&docid=EkxQXX-E20bn0M&tbnid=ulbtq3VgfG5f8M:&ved=0CAQQjB0&url=http%3A%2F%2Ffilm.subin.org.cn%2Fcast%2F%25E9%2599%2588%25E6%259D%25BE%25E5%258B%2587%2F&ei=e8sqUfazBIXckgXJz4D4CQ&psig=AFQjCNHUhrIGHjOHmbpypn2rxSI24sie7A&ust=1361843463633300"><span id="irc_ho"><font color="#000000">film.subin.org.cn</font></span></a><span id="irc_dim"><font color="#7d7d7d"> </font></span><br><br></p><br><p align="center"><font size="3" face="新細明體"><br><br></font><font size="3"><span lang="EN-US"><font face="Calibri">2</font></span><span style='font-family:"serif";'>個官兵捉</span><span lang="EN-US"><font face="Calibri">2</font></span><span style='font-family:"serif";'>個強盜</span><span lang="EN-US"><font face="Calibri">,</font></span></font></p><br><p style="margin:0cm 0cm 0pt;" class="MsoNormal" align="center"><font size="3"><span lang="EN-US"><font face="Calibri">4</font></span><span style='font-family:"serif";'>人同時登上有</span><span lang="EN-US"><font face="Calibri">10</font></span><span style='font-family:"serif";'>節車廂的火車</span><span lang="EN-US"><font face="Calibri">,</font></span></font></p><br><p style="margin:0cm 0cm 0pt;" class="MsoNormal" align="center"><font size="3"><span lang="EN-US"></span><span style='font-family:"serif";'>則強盜在自己車廂中正巧都沒遇到官兵的情形有幾種</span><span lang="EN-US"><font face="Calibri">?</font></span></font></p><br><p align="center"><font size="3" face="新細明體"><br><br></font></p>
強盜自己一人.二個強盜, 就二種.
1.強盜同車:官兵同車時10*9 官兵不同車時10*9*8⋯⋯共有810種情形 2.強盜不同車:官兵同車時10*9*8 官兵不同車時10*9*8*7 ......共有5760種 810+5760=6570。所以總共6570種(☆_☆) 動動腦不錯齁!
哦~~這是數學應用題~~考倒我了~~早安
好玩~ 早安!