document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=905632>Question 905632</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The probability that student passes the SRA Exam is 0.71. Twelve students take the exam. Find each probability (to four decimal places)\r<BR>\n" );
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document.write( "P( Exactly 6 pass the exam)\r<BR>\n" );
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document.write( "this is how i set it up (12/6) (0.71)^6 (0.29)^6\r<BR>\n" );
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document.write( "could you help me out? I'm not sure exactly how to set it up and solve it </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #549287 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=549287\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the 12/6 should be 12 C 6. This is referring to the combination formula\r<BR>\n" );
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document.write( "<a  rel=nofollow HREF=\"http://www.mathwords.com/c/combination_formula.htm\">http://www.mathwords.com/c/combination_formula.htm</a>\r<BR>\n" );
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document.write( "n C r = (n!)/(r!(n-r)!)\r<BR>\n" );
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document.write( "12 C 6 = (12!)/(6!*(12-6)!)\r<BR>\n" );
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document.write( "12 C 6 = (12!)/(6!*6!)\r<BR>\n" );
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document.write( "12 C 6 = (12*11*10*9*8*7*6!)/(6!*6!)\r<BR>\n" );
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document.write( "12 C 6 = (12*11*10*9*8*7)/(6!)\r<BR>\n" );
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document.write( "12 C 6 = (12*11*10*9*8*7)/(6*5*4*3*2*1)\r<BR>\n" );
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document.write( "12 C 6 = (665280)/(720)\r<BR>\n" );
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document.write( "12 C 6 = 924\r<BR>\n" );
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document.write( "So you should have this\r<BR>\n" );
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document.write( "(12 C 6)*(0.71)^6*(0.29)^6 \r<BR>\n" );
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document.write( "(924)*(0.71)^6*(0.29)^6 \r<BR>\n" );
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document.write( "0.0704060615439\r<BR>\n" );
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document.write( "Round that to 4 decimal places as instructed to get 0.0704\r<BR>\n" );
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document.write( "Therefore, P(Exactly 6 pass the exam) = <font color=\"red\">0.0704</font> (approximately)\r<BR>\n" );
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document.write( "This is roughly a 7.04% chance.\r<BR>\n" );
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document.write( "Here is a handy binomial distribution stats calculator\r<BR>\n" );
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document.write( "<a  rel=nofollow HREF=\"http://stattrek.com/online-calculator/binomial.aspx\">http://stattrek.com/online-calculator/binomial.aspx</a><BR>\n" );
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