document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1132767>Question 1132767</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A salesperson has a 18% chance of making a sale to any customer called upon. If 6 calls were made what is the probability that exactly 3 sales were made? At most one sale was made? At least two sales were made? What is the mean and standard deviation of the number of sales ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #749995 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=749995\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> mean is 6*0.18 or 1.08<BR>\n" );
document.write( "variance is 6*0.18*0.82 or 0.8856<BR>\n" );
document.write( "sd is sqrt (V)=0.9410.\r<BR>\n" );
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document.write( "probability of exactly 3 is 6C3*0.18^3*0.82^3=0.0643\r<BR>\n" );
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document.write( "probability of 0 is 0.82^6=0.3040<BR>\n" );
document.write( "probability of 1 is 6*0.18*0.82^5=0.4004<BR>\n" );
document.write( "So probability at most 1 is the sum or 0.7044.\r<BR>\n" );
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document.write( "probability of at least 2 sales is 1-probabilty of at most 1 or 0.2956 </SPAN>\n" );
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