document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=911268>Question 911268</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Some town planners are thinking about introducing rail to ease <BR>\n" );
document.write( "congestion on the country’s roads. It is known that commuters are <BR>\n" );
document.write( "split on the decision and sixteen commuters are polled. \r<BR>\n" );
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document.write( "a. What is the probability that 13 of these persons want rail?<BR>\n" );
document.write( "b. What is the probability that all 16 do not want rail?<BR>\n" );
document.write( "c. What is the least number of persons to prefer rail before you <BR>\n" );
document.write( "believe that there is a preference for rail?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #552969 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=552969\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p(want rail) = 1/2, n = 16<BR>\n" );
document.write( "P(x = 13)= binonpdf(16,.5,13)<BR>\n" );
document.write( "P(x = 0) =  .5^16<BR>\n" );
document.write( "c. 9 (split in general 50/50) </SPAN>\n" );
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