document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=795394>Question 795394</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A lot of 100 semiconductor chips contain 20 that are defective.<BR>\n" );
document.write( "a. two are selected , at random, without replacement, from the lot. Determine the probability that the second chip is defective.<BR>\n" );
document.write( "b. three are selected at random, without replacement, from the lot. Determine the probability that all are defective. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #480946 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=480946\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A lot of 100 semiconductor chips contain 20 that are defective.<BR>\n" );
document.write( "a. two are selected , at random, without replacement, from the lot. Determine the probability that the second chip is defective.<BR>\n" );
document.write( "P(2nd not defective) = [(20/100)(80/99)+(80/100)(79/99)] = 0.8<BR>\n" );
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document.write( "b. three are selected at random, without replacement, from the lot. Determine the probability that all are defective.<BR>\n" );
document.write( "P(3 defective) = 20C3/100C3 = 0.0071<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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