document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1190828>Question 1190828</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 12.	It is given that 40% of the population support the birthday party. One hundred and fifty members of the population are selected at random. Use a suitable approximation to find the probability that more than 55 out of the 150 support the birthday party. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #822924 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=822924\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> normal approximation<BR>\n" );
document.write( "mean=np=150*0.40=60<BR>\n" );
document.write( "variance=np(1-p)=60*0.6=36<BR>\n" );
document.write( "sd=sqrt(V)=6<BR>\n" );
document.write( "z>(55.5-60)/6, using continuity confutation factor.<BR>\n" );
document.write( "z>-0.75<BR>\n" );
document.write( "probability is 0.7733<BR>\n" );
document.write( " </SPAN>\n" );
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