document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=74867>Question 74867</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/9780073534961/algebrahomeworkh></A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> A flashlight has 6 batteries. 2 of which are defective. If 2 are selected at random without replacement, find the probability that both are defective?\r<BR>\n" );
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document.write( "The probability that none are defective are 4 out of 6 and then after i don't know where to go.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #53795 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=53795\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A flashlight has 6 batteries. 2 of which are defective. If 2 are selected at random without replacement, find the probability that both are defective? <BR>\n" );
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document.write( "# of groups of two defective = 2C2=1<BR>\n" );
document.write( "# of groups of two anything = 6C2=[6*5]/[1*2]= 15<BR>\n" );
document.write( "Prob(2 defective = 1/15<BR>\n" );
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document.write( "\Another way to look at it:<BR>\n" );
document.write( "Prob of selecting 1st defective = 2/6 = 1/3<BR>\n" );
document.write( "Prob of selectivg 2nd defective = 1/5<BR>\n" );
document.write( "Prob(2 defective ) = 1/3 * 15 = 1/15<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.\r<BR>\n" );
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document.write( "The probability that none are defective are 4 out of 6 and then after i don't know where to go.\<BR>\n" );
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