document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=211052>Question 211052</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Having lots of trouble mapping this out.  Please help.\r<BR>\n" );
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document.write( "If 4.1% of the population of Finland lives to the age of 90, what is the probability that of 1000 Finlandians:<BR>\n" );
document.write( "a) between 30 and 40 will live to be 90 years old?<BR>\n" );
document.write( "b) more than 80 of them will live to be 90 years old?<BR>\n" );
document.write( "c) less than 20 of them will like to be 90 years old? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #159454 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=159454\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If 4.1% of the population of Finland lives to the age of 90, what is the probability that of 1000 Finlandians:<BR>\n" );
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document.write( "The populatin mean is 0.041; the standard deviation is sqrt(0.041*0.959)<BR>\n" );
document.write( "= 0.1983\r<BR>\n" );
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document.write( "I'm using a TI calculator to get the answers below.<BR>\n" );
document.write( "a) between 30 and 40 will live to be 90 years old?<BR>\n" );
document.write( "Ans: binomcdf(1000,0.041,40) - binomcdf(1000,0.041,29)= 0.4493..<BR>\n" );
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document.write( "b) more than 80 of them will live to be 90 years old?<BR>\n" );
document.write( "Ans: 1 - binomcdf(1000,0.041,80) = 0.0000000099057<BR>\n" );
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document.write( "c) less than 20 of them will like to be 90 years old?<BR>\n" );
document.write( "Ans: binomcdf(1000,0.041,19) = 0.00007855<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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