document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1140898>Question 1140898</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose that 12% of the population are left-handed. What's the probability that there are more than 20 left-handed in a school of 200 sudents? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #761465 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=761465\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Can use normal approximation<BR>\n" );
document.write( "np=mean=24 expected<BR>\n" );
document.write( "np(1-p)=variance=24*0.88=21.12<BR>\n" );
document.write( "sd = sqrt (variance)=4.60<BR>\n" );
document.write( "normal approximation<BR>\n" );
document.write( "z>(20.5-24)/4.6 using continuity correction factor<BR>\n" );
document.write( ">-3.5/4.6<BR>\n" );
document.write( ">-0.76<BR>\n" );
document.write( "probability is 0.7764 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );