document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=85844>Question 85844</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A box contains 5 red and 7 green balls. How many ways can 2 balls be selected with the 2 balls the same color??\r<BR>\n" );
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document.write( "I am totally stumped??? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #62031 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=62031\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A box contains 5 red and 7 green balls. How many ways can 2 balls be selected with the 2 balls the same color??<BR>\n" );
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document.write( "Selecting 2 reds or selecting 2 greens mutually exclusive events.<BR>\n" );
document.write( "Formula: P(A or B) = P(A)+P(B)<BR>\n" );
document.write( "P(2red) = [number of ways to select 2 from 5]/[# of ways to select 2 from 12]<BR>\n" );
document.write( "P(2green)=[# of ways to select 2 from 7]/[# of ways to select 2 from 12}<BR>\n" );
document.write( "P(2 balls same) = P(2red)+P(2green)<BR>\n" );
document.write( "=[5C2]/[12C2] + [7C2]/[12C2]<BR>\n" );
document.write( "=(10+21)/66<BR>\n" );
document.write( "=31/66<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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