document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=231586>Question 231586</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In how many ways can a person enter a room that has three doors and leave it by (a) a different door? (b) any door? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #171353 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=171353\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\">  In how many ways can a person enter a room that has three doors and leave it by <BR>\n" );
document.write( "(a) a different door?<BR>\n" );
document.write( "# of ways to enter: 3<BR>\n" );
document.write( "# of ways to leave:<BR>\n" );
document.write( "Total number of choices: 3*2 = 6<BR>\n" );
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document.write( "(b) any door?<BR>\n" );
document.write( "# of ways to enter: 3<BR>\n" );
document.write( "# of ways to leave: 3<BR>\n" );
document.write( "Total number of choices: 3*3 = 9<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );