document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=328414>Question 328414</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a large hotel it is known that99% of all guests return room keys when checking out.If 250 engineers check out after a large conference,what is the probability that not more than three will fail to return their keys? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #235406 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=235406\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a large hotel it is known that 99% of all guests return room keys when checking out.If 250 engineers check out after a large conference,what is the probability that not more than three will fail to return their keys?<BR>\n" );
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document.write( "Prob a person does not return his key = 0.01<BR>\n" );
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document.write( "P(0<= x <=3) = binomcdf(250,0.01,3) = 0.7581<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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