document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=446056>Question 446056</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A SIDC JOCKY HAS 7 SONGS TO PLAY THREE ARE SLOW SONGS, AND FOUR ARE FAST SONGS WACH SONG IS TO BE PLAYED ONLY ONCE IN HOW MANY WAYS CAN THE DISC JOCKY PLAY THE 7 SONGS IF THE SONGS CAN BE PLAYED IN ANY ORDER; THE FIRST SONG MUST BE A SLOW SONG AND THE LAST SONG MUST BE A SLOW SONG; THE FIRST TWO SONGS MUST BE FAST SONGS </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #307219 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=307219\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose the life of a certain brand of vacuum cleaner is normally distributed with a mean life of 12 years and a standard deviation of 4 years. A vacuum cleaner is randomly chosen. <BR>\n" );
document.write( "10. For how many years should the manufacturer warranty its vacuum cleaners if it is willing to replace only 1% of the vacuum cleaners it sells (Round answer to the closest whole number).<BR>\n" );
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document.write( "invNorm(0.01) = -2.3263<BR>\n" );
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document.write( "Use x = zs+u<BR>\n" );
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document.write( "x = -2.3263*4+12 = 2.6946 years = 3 yrs. to the closest whole number,<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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