document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1071598>Question 1071598</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Waiting for a train or a bus that arrives every 30 minutes.  What would be the probability of waiting 15 minutes or less </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #686568 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=686568\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Look at the limits of the possible wait. <BR>\n" );
document.write( "If you pull up to the platform as soon as a bus pulls away, you'll wait 30 minutes.<BR>\n" );
document.write( "If you pull up to the platform as soon as a bus arrives, you'll wait zero minutes.<BR>\n" );
document.write( "Assuming a normal distribution, the mean would be 15 minutes. <BR>\n" );
document.write( "So,<BR>\n" );
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