document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=187364>Question 187364</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/032150108X/algebrahomeworkh>Survey of Mathematics w/ Applications expanded edition</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A couple plan to have exactly three children. <BR>\n" );
document.write( "(a) Construct a tree diagram and list the sample space.<BR>\n" );
document.write( "(b) Find the probability that the family has at least two girls<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #140439 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=140439\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A couple plan to have exactly three children. <BR>\n" );
document.write( "(a) Construct a tree diagram and list the sample space.<BR>\n" );
document.write( "1st column: b,g<BR>\n" );
document.write( "2nd column: b,g;b,g<BR>\n" );
document.write( "3rd column: b,g;b,g;b,g<BR>\n" );
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document.write( "<BR>\n" );
document.write( "<BR>\n" );
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document.write( "(b) Find the probability that the family has at least two girls<BR>\n" );
document.write( "ggb ; gbg ; bgg ; ggg<BR>\n" );
document.write( "P(at least 2 girls)  4/8 = 1/2<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );