document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1165953>Question 1165953</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A family has 4 children. Assume that each child is as likely to be a boy as it is to be a girl. Find the probability that the family has 4 girls if it is known the family has at least one girl. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #790404 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=790404\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the sample space for number of girls in 4 children<BR>\n" );
document.write( "1----4----6----4----1 from Pascal's triangle<BR>\n" );
document.write( "denominator is 16 and the probability of 0 girls is 1/16, all the way over to 4 girls, where the probability is 1/16.\r<BR>\n" );
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document.write( "So if they have at least one girl, there are 15 possibilities for the other numbers<BR>\n" );
document.write( "4 are just 1<BR>\n" );
document.write( "6 are 2<BR>\n" );
document.write( "4 are 3<BR>\n" );
document.write( "1 is 4\r<BR>\n" );
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document.write( "so the answer is 1/15. </SPAN>\n" );
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