document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=522704>Question 522704</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If you take a 30 question, multiple choice test, where each question has answer choices A, B, C, D,<BR>\n" );
document.write( "E, and you randomly guess all of the answers, what is the probability that you will get 20 correct? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #346994 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=346994\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If you take a 30 question, multiple choice test, where each question has answer choices A, B, C, D, E, and you randomly guess all of the answers, <BR>\n" );
document.write( "what is the probability that you will get 20 correct?<BR>\n" );
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document.write( "Binomial Problem with n = 30 and p = 1/5<BR>\n" );
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document.write( "P(x = 20) = 30C20*(1/5)^20*(4/5)^10 = binompdf(30,1/5,20) = 0.0000000338<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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