document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=108362>Question 108362</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You are taking a multiple-choice quiz that consists of 3 questions. Each question has 4 possible answers, only one of which is correct.  To complete the quiz, you randomly guess the answer to each question.  Find the probability of guessing (A) exactly 2 answers correctly, (B) at least 2 answers correctly, or (C) less than 2 answers correctly. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #78997 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=78997\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You are taking a multiple-choice quiz that consists of 3 questions. Each question has 4 possible answers, only one of which is correct.  To complete the quiz, you randomly guess the answer to each question.<BR>\n" );
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document.write( "With 4 possible answers on each question,<BR>\n" );
document.write( "P(correct) = 0.25<BR>\n" );
document.write( "P(wrong) = 0.75<BR>\n" );
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document.write( "  Find the probability of guessing <BR>\n" );
document.write( "(A) exactly 2 answers correctly, = binompdf(3,0.25,2)=0.1406...<BR>\n" );
document.write( "(B) at least 2 answers correctly, = 1 - binomcdf(3,0.25,2)=0.0.15625... <BR>\n" );
document.write( "(C) less than 2 answers correctly.= binomcdf(3,0.25,1) = 0.84375<BR>\n" );
document.write( "=========<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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