document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=886408>Question 886408</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Problem:<BR>\n" );
document.write( "Grade___Students__>8 HRS.__<8 HRS.<BR>\n" );
document.write( "A_______13_______12_______1<BR>\n" );
document.write( "B_______10_______8________2<BR>\n" );
document.write( "C_______8________6________2<BR>\n" );
document.write( "D_______9________2________7<BR>\n" );
document.write( "F_______10_______1________9<BR>\n" );
document.write( "What is the probability of a randomly selected student having earned an F on the exam given they devoted more than 8 hours to studying for the exam?<BR>\n" );
document.write( "a. 0.12<BR>\n" );
document.write( "b. 0.03<BR>\n" );
document.write( "c. 0.09<BR>\n" );
document.write( "d. 0.17<BR>\n" );
document.write( "I would need the answer (a,b, c or d) plus how to arrive at the answer so I can apply that to similar problems. \r<BR>\n" );
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document.write( "I tried this formula: P(A or B) = P(A) + P(B) – P(A and B) but it is not giving me any of the 4 possible answers.  I am either using the wrong formula or plugging in the numbers wrong and cannot figure out which is the issue.\r<BR>\n" );
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document.write( "Thank you for your help!<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #535908 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=535908\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 29 students studied more than 8 hours<BR>\n" );
document.write( "of those only one failed with an F<BR>\n" );
document.write( "1/29=.034<BR>\n" );
document.write( "which is answer b)\r<BR>\n" );
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document.write( "an aside :9 out of 10 who got an F studied less than 8 hours. </SPAN>\n" );
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