document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1140577>Question 1140577</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The odds against a 65 year old living to the age of 80 are 11:7. Find the probability that a 65 year old lives to age 80. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #761114 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13209)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=761114\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "The ODDS IN FAVOR OF an event, usually expressed as a ratio A:B, compares the number of favorable outcomes (A) to the number of unfavorable outcomes (B).<br><BR>\n" );
document.write( "The PROBABILITY of an event, usually expressed as a fraction, compares the number of good outcomes to the total number of outcomes.  For the odds A:B, the total number of outcomes is A+B; so the corresponding probability is A/(A+B).<br><BR>\n" );
document.write( "For your example....<br><BR>\n" );
document.write( "Odds AGAINST living to 80 = 11:7<br><BR>\n" );
document.write( "-->  Odds IN FAVOR of living to 80 = 7:11<br><BR>\n" );
document.write( "--> Probability OF living to 80 = 7/(7+11) = 7/18<br> </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );