document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1000955>Question 1000955</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The problem goes like this: \r<BR>\n" );
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document.write( "There are 10 detergent brands that are to be ranked. Determine the probability that a.) brand A is ranked first and b.) that brand A is in the top 3 brands.\r<BR>\n" );
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document.write( "I know that the answer to the first is .10, because each of the brands have 1/10 probability of ranking first. I'm not sure how to solve for b.)\r<BR>\n" );
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document.write( "An explanation would be great with the solution.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #618271 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=618271\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The problem goes like this: <BR>\n" );
document.write( "There are 10 detergent brands that are to be ranked. Determine the probability that <BR>\n" );
document.write( "a.) brand A is ranked first and <BR>\n" );
document.write( "b.) that brand A is in the top 3 brands.<BR>\n" );
document.write( " <BR>\n" );
document.write( "I know that the answer to the first is .10, because each of the brands have 1/10 probability of ranking first. <BR>\n" );
document.write( "I'm not sure how to solve for b.) <BR>\n" );
document.write( "An explanation would be great with the solution.<BR>\n" );
document.write( "# of ways for brand A to be in the top 3:: 3*9!<BR>\n" );
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document.write( "# of random arrangements; 10!<BR>\n" );
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document.write( "P(A in top 3) = 3*9!/10! = 3/10<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.s<BR>\n" );
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