document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=304843>Question 304843</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It is estimated that 10 percent of those taking the quantitative methods portion of the CPA examination fail that section. Sixty students are taking the exam this Saturday.<BR>\n" );
document.write( "a. How many would you expect to fail? What is the standard deviation?\r<BR>\n" );
document.write( "\n" );
document.write( "b. What is the probability that exactly two students will fail?\r<BR>\n" );
document.write( "\n" );
document.write( "C. What is the probability at least two students will fail?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #218295 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=218295\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> It is estimated that 10 percent of those taking the quantitative methods portion of the CPA examination fail that section. <BR>\n" );
document.write( "Sixty students are taking the exam this Saturday.<BR>\n" );
document.write( "a. <BR>\n" );
document.write( "How many would you expect to fail?;;;;;0.1(60)= 6<BR>\n" );
document.write( "What is the standard deviation?;;;; sqrt(60*0.1*0.9) = 2.32<BR>\n" );
document.write( "------------------------------------------------------------ <BR>\n" );
document.write( "b. What is the probability that exactly two students will fail?<BR>\n" );
document.write( "P(x=2) = 60C2(0.1)^2*(0.9)^58 = 0.0393<BR>\n" );
document.write( "----------------------------------------------- <BR>\n" );
document.write( "C. What is the probability at least two students will fail?<BR>\n" );
document.write( "P(2<= x <=60) = 1 - P(0<= x <=1) = 0.9862<BR>\n" );
document.write( "------------------------------------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );