document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=79225>Question 79225</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A quiz has 8 questions with answer options A and B for each. What is the probability that by pure guess work a student answer at least 6 correctly? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #56883 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=56883\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A quiz has 8 questions with answer options A and B for each. What is the probability that by pure guess work a student answer at least 6 correctly?<BR>\n" );
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document.write( "It is a binomial problem with n=8, p=1/2, 6<=x<=8<BR>\n" );
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document.write( "If you have a Ti calculator use 1- binomcdf(8,1/2,5)= 0.145<BR>\n" );
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document.write( "If you do not have a TI you need to figure 8C6(1/2)^6(1/2)2+8C7(1/2)^7(1/2)<BR>\n" );
document.write( "+8C8(1/2)8 = 37*(1/2)^8=0.145<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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