document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1136747>Question 1136747</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 2.  A salesperson contacts ten potential customers. From past experience, we know that for each potential <BR>\n" );
document.write( "     customer, the probability of them making a purchase is .10.\r<BR>\n" );
document.write( "\n" );
document.write( "[1]    a.	What is the probability the salesperson will make exactly one sale?\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "[1]    b.	What is the probability of making no sales?\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "[1]    c.	What is the probability the salesperson will make at least one sale?\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "[1]    d.	What is the expected number of sales?\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "[1]    e.	What is the standard deviation for the number of sales?\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #754555 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=754555\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> binomial with n=10 and p=0.1<BR>\n" );
document.write( "expected value is that product or 1<BR>\n" );
document.write( "variance is 1*(1-p)=.9<BR>\n" );
document.write( "sd is sqrt of 0.9 or 0.949\r<BR>\n" );
document.write( "\n" );
document.write( "probability of 1 sale is 10*0.1^1*0.9^9=0.3874\r<BR>\n" );
document.write( "\n" );
document.write( "probability of no sales is 0.9^10=0.3487\r<BR>\n" );
document.write( "\n" );
document.write( "probability of at least 1 sale is 1-prob of no sales or 0.6513 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );