document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1073370>Question 1073370</A>: <I><SPAN STYLE=\"word-break: break-all;\"> \"Suppose that the probability that any random freshman girl will agree to go with Sam to the senior prom is 0.1. Suppose Sam asks 10 random freshman girls to the prom. On average, how many freshman girls will agree to go with Sam to the prom?\"<BR>\n" );
document.write( "I understand that n=10 and p=.1 but I don't understand how to figure out the average.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #688192 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=688192\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> average is n * p = 10 * .1 = 1<BR>\n" );
document.write( "standard error is sqrt(n * p * q) = sqrt(10 * .1 * .9) = .94868...\r<BR>\n" );
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document.write( "this is normal distribution of a proportion.\r<BR>\n" );
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document.write( "here's a reference.\r<BR>\n" );
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document.write( "<a  rel=nofollow HREF= \"http://www.math.ubc.ca/~feldman/m302/binomial.pdf\" target = <BR>\n" );
document.write( "\"_blank\">http://www.math.ubc.ca/~feldman/m302/binomial.pdf</a>\r<BR>\n" );
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document.write( "lots of math in there, but the punch line is what's enclosed in the boxes.\r<BR>\n" );
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document.write( "mean = n * p.\r<BR>\n" );
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document.write( "variance = n * p * q\r<BR>\n" );
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document.write( "q = 1 - p\r<BR>\n" );
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document.write( "standard deviation is sqrt (n * p * q)\r<BR>\n" );
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