document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=187761>Question 187761</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Everytime Ashley and David play tennis, Ashley has a probability of 4/5 that she wins. if 5 games are played what is the probability that Ashley wins either 4 or 5 of the games? that she wins 3 games? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #140760 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=140760\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Everytime Ashley and David play tennis, Ashley has a probability of 4/5 that she wins. if 5 games are played what is the probability that Ashley wins either 4 or 5 of the games? that she wins 3 games?<BR>\n" );
document.write( "--------------------------------------------------<BR>\n" );
document.write( "It's binomial with n = 5, p = 4/5.<BR>\n" );
document.write( "P(she wins 4 or 5 games) = 1 - binomcdf(5,0.8,3) = 0.7373..<BR>\n" );
document.write( "--------------------------------------------------------------------<BR>\n" );
document.write( "P(she wins 3 games) = 5C3(4/5)^3(1/5)^2 = 0.2048..<BR>\n" );
document.write( "=====================================================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );