document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=362042>Question 362042</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A student is taking a multiple choice exam with 16 questions.  Each question has five alternatives.  If the student guesses on 12 of the questions what is the probability she will guess at least 8 correct? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #258056 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=258056\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x=.8 and y=.2<BR>\n" );
document.write( "Partly expand (x+y)^12<BR>\n" );
document.write( "x^12+12x^11y+66x^10y^2220x^9y^3<BR>\n" );
document.write( "=.7946 Probability 9 or more will be wrong.<BR>\n" );
document.write( "1-.7946<BR>\n" );
document.write( "=.2054 probability she will guess at least 8 correct.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );