document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1061878>Question 1061878</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Tom is planning to leave from Cebu to Manila on Monday morning and has decided that he will take a plane or ship. There are five flights and two ships departing for Cebu that morning. When he returns on Sunday afternoon, he plans to either take a plane or hitch a ride on a helicopter with a friend. There are two flights departing from Cebu to Manila. In how many ways can Tom complete this round trip?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #676641 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=676641\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 5 flights and 2 ships going gives him 7 ways to get there.<BR>\n" );
document.write( "2 flights and 1 helicopter coming home gives him 3 ways to get home.<BR>\n" );
document.write( "7 * 3 = 21 ways to get there and back.\r<BR>\n" );
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document.write( "assume the flights to get there are f1, f2, f3, f4, f5<BR>\n" );
document.write( "assume the ships to get there are s1, s2\r<BR>\n" );
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document.write( "assume the flights to get home are f6, f7<BR>\n" );
document.write( "assume the helicopter to get home is h1\r<BR>\n" );
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document.write( "if he takes f1 to get there, he can take either f6, f7, or h1 to get back.\r<BR>\n" );
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document.write( "if he takes f2 to get there, he can take either f6, f7, or h1 to get back.\r<BR>\n" );
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document.write( "in other words, for every 1 way to get there, he has 3 possible ways to get back.\r<BR>\n" );
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document.write( "do this for all 7 ways to get there and you have a total of 7 * 3 = 21 ways to get there and back.\r<BR>\n" );
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