document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1098320>Question 1098320</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The odds that a month, chosen at random, has 31 days is 7:5. Find the probability of that event. Write your answer as a fraction (n/d) in lowest terms. p(31)= </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #712668 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=712668\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br>For the odds (n favor of) a particular outcome, the ratio is<BR>\n" );
document.write( "(number of good outcomes) : {number of bad outcomes)<br><BR>\n" );
document.write( "For probability, the ratio is<BR>\n" );
document.write( "(number of good outcomes) / (total of all possible outcomes)<br><BR>\n" );
document.write( "Note that it is customary to use the : when writing odds and the / when writing probabilities.  You will sometimes see probabilities written with the : but that is confusing to many people.<br><BR>\n" );
document.write( "There are 12 months, of which 7 have 31 days each and the other 5 do not.  So while the odds of a month having 31 days is 7:5, the probability of a month having 31 days is 7/12. </SPAN>\n" );
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