document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=896211>Question 896211</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A school is sending 11 children to a camp.  If 20% of the children in the school are first graders, and the 8 children are selected at random, what is the mean and variance of the number of first graders chosen?<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 #543330 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=543330\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A school is sending 11 children to a camp. If 20% of the children in the school are first graders, and the 8 children are selected at random, what is the mean and variance of the number of first graders chosen?<BR>\n" );
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document.write( "Binomial Problem:<BR>\n" );
document.write( "mean = np = 11*0.2 = 2.2<BR>\n" );
document.write( "variance = pq/n = (0.2*0.8)/8 = 0.16/8 = 0.2<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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