document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=481093>Question 481093</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Person A and Person B are doing target practice.  Person A hits the target with a probability of 0.8, while Person B hits the target with a probability of 0.9.\r<BR>\n" );
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document.write( "What is the probability that Person B hit the target given that both of them fired and exactly one shot hit the target?\r<BR>\n" );
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document.write( "a. 0.18<BR>\n" );
document.write( "b. 0.30<BR>\n" );
document.write( "c. 0.69<BR>\n" );
document.write( "d. 0.90\r<BR>\n" );
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document.write( "I came up with .50*.80 =.40  and .50*.90=.45  thus .40*.45=0.18  Is this correct?  \r<BR>\n" );
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document.write( "Thank you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #329453 by </B><A HREF=/tutors/aboutme.mpl?userid=robertb><B>robertb(5830)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=robertb><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=robertb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=329453\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If exactly one of them hits the target, then the probability is 0.80*0.10 + 0.90*0.20 = 0.26.<BR>\n" );
document.write( "Hence the the probability that person B hit the target given that both of them fired is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%280.90%2A0.20%29%2F0.26+=+9%2F13+=+0.6923 ALIGN=MIDDLE  ALT=\"%280.90%2A0.20%29%2F0.26+=+9%2F13+=+0.6923\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or 0.69 to 2 decimal places.\r<BR>\n" );
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document.write( "c. 0.69 </SPAN>\n" );
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