document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=429572>Question 429572</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please show me how to do these difficult homework problems:\r<BR>\n" );
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document.write( "A new drug can cause two unwanted side effects: drowsiness and headache. 6% of its users experienced drowsiness, 4% experienced headache, and 2% experienced both.\r<BR>\n" );
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document.write( "If a user experienced headache, what is the probability that he also experienced drowsiness?\r<BR>\n" );
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document.write( " What is the percentage of users who experienced neither side effect? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #298354 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=298354\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A new drug can cause two unwanted side effects: drowsiness and headache. 6% of its users experienced drowsiness, 4% experienced headache, and 2% experienced both. <BR>\n" );
document.write( "If a user experienced headache, what is the probability that he also experienced drowsiness?<BR>\n" );
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document.write( "P(d|h) = P(d and h)/P(h) = 0.02/0.04 = 1/2<BR>\n" );
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document.write( "What is the percentage of users who experienced neither side effect?<BR>\n" );
document.write( "P(h or d) = 0.06+0.04-0.02 = 0.08<BR>\n" );
document.write( "Therefore P(neither) = 0.02<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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