document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=163450>Question 163450</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What's the probability that a sum of 7 or 11 appears at least twice, if the a pair of fair dice are tossed 3 times. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #120416 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=120416\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The probability of 11 on one roll is 2/36<BR>\n" );
document.write( "The probability of 7 on one roll is 6/36<BR>\n" );
document.write( "The probability of 7 or 11 on one roll is 8/36=2/9<BR>\n" );
document.write( "(a+b)^3=a^3+3a^2b+3ab^2+b^3<BR>\n" );
document.write( "Let a=2/9 and b=7/9<BR>\n" );
document.write( "We are only interested in the 1st 2 terms:<BR>\n" );
document.write( "(2/9)^3+3(2/9)^2(7/9)=.1262 answer.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed<BR>\n" );
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