document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=528339>Question 528339</A>: <I><SPAN STYLE=\"word-break: break-all;\"> An exam consists of 20 true-or-false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly 12 questions correctly? (Round your answer to three decimal places.) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #349295 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=349295\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> An exam consists of 20 true-or-false questions. If a student guesses at every answer, what is the probability that he or she will answer exactly 12 questions correctly? <BR>\n" );
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document.write( "Binomial Problem with n = 20 and p(correct) = 1/2<BR>\n" );
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document.write( "P(x = 12) = 20C12*(1/2)^12*(1/2)^8 = 0.1201<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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