document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=364104>Question 364104</A>: <I><SPAN STYLE=\"word-break: break-all;\"> We believe that 90% of the population of all Calculus I students consider calculus an exciting subject.  Suppose we randomly and independently selected 21 students from the population.  If the true percentage is really 90%, find the probability of observing 20 or more of the students who consider calculus to be an exciting subject in our sample of 21. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #259692 by </B><A HREF=/tutors/aboutme.mpl?userid=amoresroy><B>amoresroy(361)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=amoresroy><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/cgi-bin/show-face.mpl?user=amoresroy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=259692\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Probability of observing 20 or more students <BR>\n" );
document.write( "  <BR>\n" );
document.write( "    = .90 * 21 / 20\r<BR>\n" );
document.write( "\n" );
document.write( "    = .945\r<BR>\n" );
document.write( "\n" );
document.write( "    = 94.5%\r<BR>\n" );
document.write( "\n" );
document.write( "Note; 36% answer is too low. I don't know how 36% answer was solved.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "     </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );