document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1063162>Question 1063162</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello Sir! My email address is: shahnirav72@gmail.com.                             <BR>\n" );
document.write( "Question is as follows: Seven different lecturers are to deliver lectures in seven periods of a class on a particular day. A,B and C are 3 of the lecturers. The number of ways in which routine can be prepared such that A delievers  his lecture before B and B before C is? Options are (a) 420 (b) 120 (c) 210 (d) 840   Please help me out to solve this sum. Thanks a lot.......... I have tried much by 5P5*5P5*5P5= 5*5*5=125 but that doesn't match the answer.<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 #678221 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=678221\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We need to reserve 3 slots for A, B, and C.<BR>\n" );
document.write( "There are <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%2A6%2A5%2F%282%2A3%29=7%2A5=35 ALIGN=MIDDLE  ALT=\"7%2A6%2A5%2F%282%2A3%29=7%2A5=35\"   DISABLED_style= \"max-width:90%; height:auto;\" > sets of 3 schedule slots<BR>\n" );
document.write( "that we can reserve for professors A, B, and C.<BR>\n" );
document.write( "The remaiming <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7-3=4 ALIGN=MIDDLE  ALT=\"7-3=4\"   DISABLED_style= \"max-width:90%; height:auto;\" > slots will be filled by the other e lecturers in any order.<BR>\n" );
document.write( "There are <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4%21=4%2A3%2A2=24 ALIGN=MIDDLE  ALT=\"4%21=4%2A3%2A2=24\"   DISABLED_style= \"max-width:90%; height:auto;\" > possible permutations<BR>\n" );
document.write( "indicating the order of those lecturers' presentations.<BR>\n" );
document.write( "Combining those choices there are<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=35%2A24=highlight%28840%29 ALIGN=MIDDLE  ALT=\"35%2A24=highlight%28840%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > schedules for the 7 lectures<BR>\n" );
document.write( "that meet the requirement of having A before B, and B before C.<BR>\n" );
document.write( "Without that requirement, there would be<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=7%21=7%2A6%2A5%2A4%2A3%2A2=5040 ALIGN=MIDDLE  ALT=\"7%21=7%2A6%2A5%2A4%2A3%2A2=5040\"   DISABLED_style= \"max-width:90%; height:auto;\" > possible schedules. </SPAN>\n" );
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