document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=820317>Question 820317</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The exam has 50 questions and each question has  four multiple questions in which one of the choice is correct answer. If a student answers  the entire question by guess , what is the chance that he /she will answer <BR>\n" );
document.write( "a.	Half of the questions correctly?<BR>\n" );
document.write( "b.	¾  of the questions correctly ?<BR>\n" );
document.write( "c.	The entire questions correctly <BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #493459 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=493459\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The exam has 50 questions and each question has four multiple questions in which one of the choice is correct answer.<BR>\n" );
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document.write( "Binomial Problem with n = 50 and p(correct) = 1/4<BR>\n" );
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document.write( "If a student answers the entire question by guess , what is the chance that he /she will answer <BR>\n" );
document.write( "a. Half of the questions correctly?<BR>\n" );
document.write( "P(x = 25) = 50C25*(1/4)^25(3/4)^25 = binompdf(50,1/4,25) = 0.0000845..<BR>\n" );
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document.write( "b. ¾ of the questions correctly ?<BR>\n" );
document.write( "P(x = 38) = binompdf(50,1/4,38) = 5.09..x10^-14<BR>\n" );
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document.write( "c. The entire questions correctly<BR>\n" );
document.write( "P(x = 50) = (1/4)^50 = 7.89..x10^-31<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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