document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1172254>Question 1172254</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a village, there are 64 families each of them has four children. Find the probability that each r number of families has exactly two girls </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #797268 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=797268\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> for 4 children the distribution for number of girls is<BR>\n" );
document.write( "1--4---6---4---1<BR>\n" );
document.write( "or 4C2(1/2)^2*(1/2)^2=6/16 or 3/8.<BR>\n" );
document.write( "There is a 0.375 probability a randomly selected family has 2 girls.<BR>\n" );
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document.write( "The wording isn't clear. The expected number of families with two girls is 24, 64*3/8. </SPAN>\n" );
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