document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=619075>Question 619075</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The probability that you will invest in a stock which appreciates, or is a “good” stock is 1 in 10. Find the probability that your 6th  stock is your 3rd good stock?\r<BR>\n" );
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document.write( "I dont know where to start. Please helpppp  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #389330 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=389330\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The probability that you will invest in a stock which appreciates, or is a “good” stock is 1 in 10. Find the probability that your 6th stock is your 3rd good stock? <BR>\n" );
document.write( "I dont know where to start. Please helpppp <BR>\n" );
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document.write( "Let \"g\" be good stock<BR>\n" );
document.write( "Let \"n\" be not good stock<BR>\n" );
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document.write( "Acceptable patterns: -,-,-,-,-,-<BR>\n" );
document.write( "Last stock is \"g\".<BR>\n" );
document.write( "There are 5C2 = 10 ways to place 2 other \"g\" stock in the 1st five.<BR>\n" );
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document.write( "P(condition) = (10*g^2*n^3)*g = 10(0.1)^3*(0.9)^3 = 0.0081<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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