document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=912151>Question 912151</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A football team consists of 20 freshmen and 20 sophomores, 15 juniors, and 10 seniors. Four players are selected at random to serve as captains. Find the probability that<BR>\n" );
document.write( "a. all 4 are seniors<BR>\n" );
document.write( "b. there is 1 each: freshman, sophomore, junior, senior<BR>\n" );
document.write( "c. there are 2 sophomores and 2 freshmen<BR>\n" );
document.write( "d. at least 1 of the students is a senior </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #553614 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=553614\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> total <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=65 ALIGN=MIDDLE  ALT=\"65\"   DISABLED_style= \"max-width:90%; height:auto;\" >: 20F, 20S,15J,10Sr<BR>\n" );
document.write( "4 Selected<BR>\n" );
document.write( "P(all Ss) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%2810C4%29%2F%2865C4%29 ALIGN=MIDDLE  ALT=\"%2810C4%29%2F%2865C4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "P(1 each) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%2820C1%29%2820C1%29%2815C1%29%2810C1%29%29%2F%2865C4%29 ALIGN=MIDDLE  ALT=\"%28%2820C1%29%2820C1%29%2815C1%29%2810C1%29%29%2F%2865C4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "P(2S AND 2F) = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28%2820C2%29%2820C2%29%29%2F%2865C4%29 ALIGN=MIDDLE  ALT=\"%28%2820C2%29%2820C2%29%29%2F%2865C4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "P(at least Sr) = 1 - P(no Sr) = 1 - <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=55C4%2F%2865C4%29 ALIGN=MIDDLE  ALT=\"55C4%2F%2865C4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );