document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1027998>Question 1027998</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The random variable x represents the number of boys in a family of three children. Assuming that boys and<BR>\n" );
document.write( "girls are equally likely, find the mean and standard deviation for the random variable x.<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 #643188 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=643188\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For three children the possible outcomes are,<BR>\n" );
document.write( "BBB=3<BR>\n" );
document.write( "BBG=2<BR>\n" );
document.write( "BGB=2<BR>\n" );
document.write( "BGG=1<BR>\n" );
document.write( "GBB=2<BR>\n" );
document.write( "GBG=1<BR>\n" );
document.write( "GGB=1<BR>\n" );
document.write( "GGG=0<BR>\n" );
document.write( "So the probability distribution is,<BR>\n" );
document.write( "0, 1/8<BR>\n" );
document.write( "1, 3/8<BR>\n" );
document.write( "2, 3/8<BR>\n" );
document.write( "3, 1/8<BR>\n" );
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document.write( "I used an EXCEL spreadsheet.<BR>\n" );
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document.write( ".\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/display-illustration.mpl?tutor=Fombitz&illustration_name=nw5.JPG\">.<BR>\n" );
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