document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=916566>Question 916566</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A box contains 50 computer chips of which 8 are known to be bad. A chip<BR>\n" );
document.write( "is selected at random and tested.<BR>\n" );
document.write( "(a) What is the probability that it is bad?<BR>\n" );
document.write( "(b) If a test on the first chip shows that it is bad, what is the probability that<BR>\n" );
document.write( "a second chip selected at random will also be bad, assuming the tested<BR>\n" );
document.write( "chip is not put back into the box?<BR>\n" );
document.write( "(c) If the first chip tests good, what is the probability that a second chip<BR>\n" );
document.write( "selected at random will be bad, assuming the tested chip is not put<BR>\n" );
document.write( "back into the box? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #556181 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=556181\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 50 Chips, 8 bad, 42 good<BR>\n" );
document.write( "a. one drawn..P(bad) = 8/50  = 4/25<BR>\n" );
document.write( "b. Second drawn- first not replaced....P(bad| 1st bad) =  7/49 = 1/7<BR>\n" );
document.write( "c. Second drawn- first not replaced...P(bad|1st good) =  8/49 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );