document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=190148>Question 190148</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A class contains 3 fresh, 4 soph, 6 juniors and 2 seniors. four students are selected at random, find the probability that...<BR>\n" );
document.write( "a. all four are juniors<BR>\n" );
document.write( "b. no fresh are selected  <BR>\n" );
document.write( "c. 1 of each year is selected  <BR>\n" );
document.write( "d.. 2 fresh and 2 juniors </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #142794 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=142794\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A class contains 3 fresh, 4 soph, 6 juniors and 2 seniors. four students are selected at random, find the probability that...<BR>\n" );
document.write( "a. P(all four are juniors) = 6C4/15C4 = 15/1365 = 0.01099..<BR>\n" );
document.write( "------------------------------------------------------------<BR>\n" );
document.write( "b. P(no fresh are selected) = 12C4/15C4 = 495/1365<BR>\n" );
document.write( "------------------------------------------------------------- <BR>\n" );
document.write( "c. P(1 of each year is selected) = (3+4+6+2)/1365 = 15/1365<BR>\n" );
document.write( "------------------------------------------------------------ <BR>\n" );
document.write( "d.. P(2 fresh and 2 juniors) = [3C2 + 6C2]/15C4 = (3 + 15)/1365 = 18/1365<BR>\n" );
document.write( "-------------------------------------------------------------<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );