document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=375910>Question 375910</A>: <I><SPAN STYLE=\"word-break: break-all;\"> in a school,45% of the students are boys and 55% are girls. in this school, 12% of the boys are left handed and 9% of the girls are left handed. a student is to be chosen at random using a tree diagram\r<BR>\n" );
document.write( "\n" );
document.write( "a) calculate the probability that the student is not left handed\r<BR>\n" );
document.write( "\n" );
document.write( "Given that the student chosen is left handed,\r<BR>\n" );
document.write( "\n" );
document.write( "b)calculate, to 3 significant figures,the probabillity that the student is a girl </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #267453 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=267453\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We can't do tree diagrams on this site.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "a) (.45*.88)+(.55*.91)=.8965<BR>\n" );
document.write( ".<BR>\n" );
document.write( "b)<BR>\n" );
document.write( ".45*.12=.0540 LHB<BR>\n" );
document.write( ".55*.09=.0495 LHG<BR>\n" );
document.write( "----------------<BR>\n" );
document.write( "=======>.1035 Total LH<BR>\n" );
document.write( ".<BR>\n" );
document.write( ".0495/.1035 = .478 Given that the student chosen is left handed, the probabillity that the student is a girl.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );