document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=198782>Question 198782</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The average number of days school is closed due to snow during the winter in a certain city in the eastern part of United States is 4.What is the probability that the school in this city will close for 2 or more days during winter </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #149384 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=149384\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The average number of days school is closed due to snow during the winter in a certain city in the eastern part of United States is 4.What is the probability that the school in this city will close for 2 or more days during winter<BR>\n" );
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document.write( "You cannot answer this unless you know the probability of snow on a day<BR>\n" );
document.write( "in the winter.<BR>\n" );
document.write( "It's a binomial problem with np = 4.<BR>\n" );
document.write( "If you assume the \"winter\" means 365/4 = 91 days then p = 4/91.<BR>\n" );
document.write( "In that case P(x >= 2) = 1 - binomcdf(91,(4/91),1) = 0.9133<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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