document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=680956>Question 680956</A>: <I><SPAN STYLE=\"word-break: break-all;\"> dear tutors, pls help me with this problem:\r<BR>\n" );
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document.write( "A professor grading a statistics examination has promised to give an equal number of A's, B's, C's, and D's. If three students are chosen randomly, what is the probability that all three will receive different grades?\r<BR>\n" );
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document.write( "thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #422535 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=422535\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A professor grading a statistics examination has promised to give an equal number of A's, B's, C's, and D's. If three students are chosen randomly, what is the probability that all three will receive different grades?<BR>\n" );
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document.write( "If there are 4 students:<BR>\n" );
document.write( "The 1st choice can be any grade.<BR>\n" );
document.write( "The 2nd is one of 3<BR>\n" );
document.write( "The 3rd is one of 2<BR>\n" );
document.write( "1/3 * 1/2 = 1/6<BR>\n" );
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document.write( " </SPAN>\n" );
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