document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1064199>Question 1064199</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Samples of spinal fluids are routinely tested for the presence of tuberculosis (TB) and bacteria. Suppose that 80% of the samples attest negative for both TB and bacteria. What is the probability that a random sample tests positive for either TB or bacteria? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #679309 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=679309\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Samples of spinal fluids are routinely tested for the presence of tuberculosis (TB) and bacteria. Suppose that 80% of the samples attest negative for both TB and bacteria. What is the probability that a random sample tests positive for either TB or bacteria?<BR>\n" );
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document.write( "P(TB or bact) + P(not TB or bact) = 1<BR>\n" );
document.write( "P(TB or bact) = 1-0.8 = 0.2<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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