document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=198605>Question 198605</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A telemarketer makes six phone calls per hour and is able to make a sale on 30% of these contacts. During the next two hours. Find: \r<BR>\n" );
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document.write( "a) The probability of exactly making four sales.<BR>\n" );
document.write( "b) The probability of making no sales.<BR>\n" );
document.write( "c) The probability of exactly making two sales.<BR>\n" );
document.write( "d) The mean number of sales within the two-hour period.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #149136 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=149136\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A telemarketer makes six phone calls per hour and is able to make a sale on 30% of these contacts. During the next two hours. Find: <BR>\n" );
document.write( "a) The probability of exactly making four sales.<BR>\n" );
document.write( "Ans: 6C4(0.3)^4(0.7)^2) = 0.0595<BR>\n" );
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document.write( "b) The probability of making no sales.<BR>\n" );
document.write( "Ans: (0.7)^4 = 0.2401<BR>\n" );
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document.write( "c) The probability of exactly making two sales.<BR>\n" );
document.write( "Ans: 6C2(0.3)^2(0.7)^4 = 324135...<BR>\n" );
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document.write( "d) The mean number of sales within the two-hour period.<BR>\n" );
document.write( "mean = np = 6*0.3 = 1.8 sales<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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