document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=322383>Question 322383</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A vaccine is 80% effective in preventing Type B influenza. In other words, 80% of those receiving the vaccine will not catch this type of flu. <BR>\n" );
document.write( "A random sample of 100 people has been given the vaccine. What is the probability that at least 75 will not catch this type of flu? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #230824 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=230824\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A vaccine is 80% effective in preventing Type B influenza. In other words, 80% of those receiving the vaccine will not catch this type of flu. <BR>\n" );
document.write( "A random sample of 100 people has been given the vaccine. What is the probability that at least 75 will not catch this type of flu?<BR>\n" );
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document.write( "Binomial with n = 100 and p = 0.8<BR>\n" );
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document.write( "P(75<= x <=100) = 1 - binomcdf(100,0.8,74) = 0.9125<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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