document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=453567>Question 453567</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A couple has 7 children. What is the probability of having exactly 2 boys? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #311635 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=311635\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Assume an equal likelihood of having a girl or a boy.<BR>\n" );
document.write( "g=.5, b=.5<BR>\n" );
document.write( "(g+b)^7<BR>\n" );
document.write( "nCr=7C2=21<BR>\n" );
document.write( "21g^5b^2<BR>\n" );
document.write( "=.1641 the probability of having exactly 2 boys.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );