document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=289839>Question 289839</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Tim has 4 table tennis balls with small cracks. His friend accidentally mixed them in with 16 good balls. If Tim randomly picks 3 table tennis balls, what is the probability that at least 1 is cracked?\r<BR>\n" );
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document.write( "Not sure how to approach this problem/what formula to use.<BR>\n" );
document.write( "My first thought was to multiply 4/20*3/20*2/20, but the answer I got (.003) obviously seems a little off. Help! </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #209848 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=209848\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 1st or 2nd or 3rd is cracked<BR>\n" );
document.write( "or means add<BR>\n" );
document.write( "4/20+3/19+2/18<BR>\n" );
document.write( "1/5+3/19+1/9<BR>\n" );
document.write( "401/855=.469<BR>\n" );
document.write( "after choosing the first there are only 19 left </SPAN>\n" );
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