document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=275485>Question 275485</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A bag contains 20 M&M's; 5 are blue, 9 are red, and 6 are yellow<BR>\n" );
document.write( "a) If 2 M&M's are randomly selected without replacement, what is the probability both are blue?<BR>\n" );
document.write( "For this, I tried:<BR>\n" );
document.write( "P (2 blue) = (5/20)(4/19)<BR>\n" );
document.write( "b) If 2 M&Ms are randomly selected without replacement, what is the probability at least 1 is blue?<BR>\n" );
document.write( "For this, i tried:<BR>\n" );
document.write( "P (at least 1 is blue)<BR>\n" );
document.write( "1- P (none blue) = 1-(15/20) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #200925 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=200925\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> nCr=combination: n things taken r at a time=n!/((n-r)!r!)<BR>\n" );
document.write( ".<BR>\n" );
document.write( "a)<BR>\n" );
document.write( "5C2/20C2<BR>\n" );
document.write( "=10/190<BR>\n" );
document.write( "=1/19  probability both are blue.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "b)<BR>\n" );
document.write( "15C2/20C2 probability none are blue<BR>\n" );
document.write( "=105/190<BR>\n" );
document.write( "=21/38<BR>\n" );
document.write( "1- 21/38 = 17/38  probability at least 1 is blue.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );