document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1117767>Question 1117767</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve thhis question:  A salesperson has a policy of calling upon a customer a second time if she does not make the sale on the first call, and trying a third time, and last time if she fails on the first two calls. She has a probability of a sale on the first call of 0.3. If she fails on the first call, the probability of a sale on the second call is 0.2. If the first two calls are unsuccessful, her probability of success on the third call is only 0.1. \r<BR>\n" );
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document.write( "What is the probability that she makes the sale to a given customer ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #732935 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=732935\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p(sale on first call) = .3 and p(no sale on first call) = .7<BR>\n" );
document.write( "p(sale on second call) = .2 and p(no sale on second call) = .8<BR>\n" );
document.write( "p(sales on third call) = .1 and p(no sale on third call) = .9\r<BR>\n" );
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document.write( "she can make the sale on the first call, or on the second call, or on the third call.\r<BR>\n" );
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document.write( "the probability she makes the sale on the first call is .3.\r<BR>\n" );
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document.write( "the probability she makes the sale on the second call is .7 * .2.\r<BR>\n" );
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document.write( "that is the probability she doesn't make the sale on the first call * the probability that she does make the sale on the second call.\r<BR>\n" );
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document.write( "the probability she makes the sale on the third call is .7 * .8 * .1.\r<BR>\n" );
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document.write( "that is the probability she doesn't make the sale on the first call * the probability she doesn't make the sale on the second call * the probability she makes the sale on the third call.\r<BR>\n" );
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document.write( "her probability of making a sale on either the first call or the second call or on the third call is equal to .3 + (.7 * .2) + (.7 * .8 * .1).\r<BR>\n" );
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document.write( "this would be equal to .496.\r<BR>\n" );
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document.write( "that's what i think your answer will be, if i am correct.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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