document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=772204>Question 772204</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 9.	Customers arrive at a particular ATM at the rate of 30 customers per hour.<BR>\n" );
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document.write( "a.	What is the probability of three customers arriving in a five minute-time interval?\r<BR>\n" );
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document.write( "Since it’s for a 5 minute interval: 30/60=0.5/min <BR>\n" );
document.write( "0.5*5 mins=2.5 customers for 5 mins\r<BR>\n" );
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document.write( "f(3)=2.53e-2.5/3!<BR>\n" );
document.write( "=0.21376\r<BR>\n" );
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document.write( "b.	What is the probability of at least three customers arriving in a five-minute interval? NEED HELP WITH THIS PART\r<BR>\n" );
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document.write( "F(&#8805;3)= 1-F(&#8804;2)<BR>\n" );
document.write( "=1-2.52e-2.5/2!\r<BR>\n" );
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document.write( "c.	What is the probability of no customers arriving in a five-minute interval?\r<BR>\n" );
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document.write( "F(0)= 2.50e-2.5/0!<BR>\n" );
document.write( "=0.08208<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 #470714 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=470714\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Times New Roman\" size=\"+2\">\r<BR>\n" );
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document.write( "Use parentheses, and THEN do your arithmetic.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE 1\ -\ \left(2.52e\ -\ \frac{2.5}{2!}\right)\ =\ 1\ -\ 2.52e\ +\ \frac{2.5}{2}\">\r<BR>\n" );
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document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi}\ +\ 1\ =\ 0\"><BR>\n" );
document.write( "<font face=\"Math1\" size=\"+2\">Egw to Beta kai to Sigma</font><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
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