document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=306608>Question 306608</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Suppose there are 10 balls in an urn, 4 blue,4 red , 2 green. The balls are also numbered 1 to 10. How many ways are there to select an ordered sample of 4 balls without replacement such that there are 2 blue balls and 2 red balls in the sample? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #219393 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=219393\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Suppose there are 10 balls in an urn, 4 blue,4 red , 2 green. The balls are also numbered 1 to 10. How many ways are there to select an ordered sample of 4 balls without replacement such that there are 2 blue balls and 2 red balls in the sample?<BR>\n" );
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document.write( "# of ways to select 2 blue balls: 4C2 = 6<BR>\n" );
document.write( "# of ways to select 2 red balls:: 4C2 = 6<BR>\n" );
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document.write( "# of ways to select 4 random balls from 10 : 10C4 = 210<BR>\n" );
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document.write( "P(2 blue and 2 red) = (6*6)/210 = 36/210 = 0.17<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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