document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1128325>Question 1128325</A>: <I><SPAN STYLE=\"word-break: break-all;\"> On average, a ship arrives at a certain dock every second day. What is the probability that two or more ships will arrive on a randomly selected day? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #745006 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=745006\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The parameter for this Poisson function (discrete, proportional, and theoretically could be infinite) is 0.5<BR>\n" );
document.write( "Look at probability of 0 and 1 then subtract from 1 to get 2 or more.<BR>\n" );
document.write( "For 0, e^(-0.5)0.5^0/0!=0.6065<BR>\n" );
document.write( "for 1, e^(-0.5)0.5^1/1!=0.3033  Those probabilities add to 0.9098, so the probability of 2 or more on a given day is 0.0902 </SPAN>\n" );
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