document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=176625>Question 176625</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 3.  A business owner decides to use a binomial distribution to solve one of his problems. He knows there is a 60 percent probability that he will sell one of his Red Oak floors to any customer who comes into his shop and views the wood.  Out of the next 7 people who come into his shop, what is the probability that 3 people will buy a Red Oak floor?  ___________      What is the probability that more than four people will buy the Red oak floor?  ___________ </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #131760 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=131760\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A business owner decides to use a binomial distribution to solve one of his problems. He knows there is a 60 percent probability that he will sell one of his Red Oak floors to any customer who comes into his shop and views the wood. Out of the next 7 people who come into his shop, <BR>\n" );
document.write( "what is the probability that 3 people will buy a Red Oak floor? ___________ <BR>\n" );
document.write( "Using a TI calculator I get binompdf(7,0.6,3) = 0.1935..<BR>\n" );
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document.write( "What is the probability that more than four people will buy the Red oak floor? <BR>\n" );
document.write( "1 - binomcdf(7,0.6,4) = 0.4199...<BR>\n" );
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document.write( "Alternate solution:<BR>\n" );
document.write( "P(4 < x < 7) = P(x=5) + P(x=6) + P(x=7)<BR>\n" );
document.write( "= 7C5(0.6)^5(0.4)^2 + 7C6(0.6)^6(0.4) + 7C7(0.6)^7(0.4)^0\r<BR>\n" );
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document.write( "= 21*0.07776*0.16 + 7*0.04665*0.4 + 1*0.02799\r<BR>\n" );
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document.write( "= 0.26127 + 0.13062 + 0.02799\r<BR>\n" );
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document.write( "= 0.41988...<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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document.write( "___________<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( " </SPAN>\n" );
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