document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1185897>Question 1185897</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A certain kind of sheet metal has, on average, 3 defects per 14 square feet.<BR>\n" );
document.write( "Assuming a Poisson distribution, find the probability that a 20 square foot metal sheet has at least 4 defects. Round your answer to three decimal places. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #817045 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=817045\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The pmf for the Poisson distribution is  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p%28x%29+=+e%5E%28-lambda%29%2A%28lambda%5Ex%2Fx%21%29 ALIGN=MIDDLE  ALT=\"p%28x%29+=+e%5E%28-lambda%29%2A%28lambda%5Ex%2Fx%21%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=lambda ALIGN=MIDDLE  ALT=\"lambda\"   DISABLED_style= \"max-width:90%; height:auto;\" > is computed as <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=lambda+=+%283%2F14%29%2A20+=+30%2F7 ALIGN=MIDDLE  ALT=\"lambda+=+%283%2F14%29%2A20+=+30%2F7\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "The probability is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1+-+p%280%29+-+p%281%29+-+p%282%29+-+p%283%29+=+1+-+e%5E%28-30%2F7%29%2A%28%2830%2F7%29%5E0%2F0%21%29+-e%5E%28-30%2F7%29%2A%28%2830%2F7%29%5E1%2F1%21%29+-+++e%5E%28-30%2F7%29%2A%28%2830%2F7%29%5E2%2F2%21%29+-+e%5E%28-30%2F7%29%2A%28%2830%2F7%29%5E3%2F3%21%29+=+1+-+e%5E%28-30%2F7%29%2A%28%2830%2F7%29%5E0%2F0%21+%2B+%2830%2F7%29%5E1%2F1%21+%2B++%2830%2F7%29%5E2%2F2%21+%2B+%2830%2F7%29%5E3%2F3%21%29+ ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "Now use your scientific calculator to compute the required probability to the desired number of decimal places. </SPAN>\n" );
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