document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1042325>Question 1042325</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the indicated probabilities using the geometric&#8203; distribution, the Poisson&#8203; distribution, or the binomial distribution. Then determine if the events are unusual. If&#8203; convenient, use the appropriate probability table or technology to find the probabilities.\r<BR>\n" );
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document.write( "Assume the probability that you will make a sale on any given telephone call is <BR>\n" );
document.write( "0.17. Find the probability that you&#8203; (a) make your first sale on the fifth&#8203; call, (b) make your sale on the&#8203; first, second, or third&#8203; call, and&#8203; (c) do not make a sale on the first three calls. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #657407 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=657407\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the xth call be the call that the first sale is made.  The support is then x = 1,2,3,4,5,.... .\r<BR>\n" );
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document.write( "===> Use the geometric distribution with pmf <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p%28x%29+=+%281-p%29%5E%28x-1%29%2Ap+=+0.83%5E%28x-1%29%2A0.17 ALIGN=MIDDLE  ALT=\"p%28x%29+=+%281-p%29%5E%28x-1%29%2Ap+=+0.83%5E%28x-1%29%2A0.17\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "===> (a) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p%285%29+=+0.83%5E4%2A0.17+=+0.0807 ALIGN=MIDDLE  ALT=\"p%285%29+=+0.83%5E4%2A0.17+=+0.0807\"   DISABLED_style= \"max-width:90%; height:auto;\" >, to three significant figures.\r<BR>\n" );
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document.write( "(b) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=p%281%29+%2B+p%282%29+%2B+p%283%29+=+0.17+%2B+0.83%2A0.17+%2B+0.83%5E2%2A0.17+=+0.42821 ALIGN=MIDDLE  ALT=\"p%281%29+%2B+p%282%29+%2B+p%283%29+=+0.17+%2B+0.83%2A0.17+%2B+0.83%5E2%2A0.17+=+0.42821\"   DISABLED_style= \"max-width:90%; height:auto;\" >, to five significant figures.\r<BR>\n" );
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document.write( "(c) <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1-p%281%29+-+p%282%29+-+p%283%29+=+1+-+0.42821+=+0.57179 ALIGN=MIDDLE  ALT=\"1-p%281%29+-+p%282%29+-+p%283%29+=+1+-+0.42821+=+0.57179\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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