document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=418203>Question 418203</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When an aopinion poll calls residential telephone numbers at random only 20% of the calls reach a live person   you watch the random digit dialing machine make 15 calls.  <BR>\n" );
document.write( "What is the probability that at most 3 calls reach a person?<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 #292733 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=292733\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> When an aopinion poll calls residential telephone numbers at random only 20% of the calls reach a live person you watch the random digit dialing machine make 15 calls. <BR>\n" );
document.write( "What is the probability that at most 3 calls reach a person?\r<BR>\n" );
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document.write( "Binomial with n = 15 and p = 0.2<BR>\n" );
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document.write( "P(0<= x <=3) = binomcdf(15,0.2,3)<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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