document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=960121>Question 960121</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Helen is looking at colleges. The probability that she gets into schools A and B is 3/7. If the probability that Helen gets into school B is 9/14, find the probability that Helen gets into school A, given that she gets into school B.\r<BR>\n" );
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document.write( "Sorry for the bother, im just really struggling with probability. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #586787 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=586787\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Probability(P) that Helen gets into school B given that she gets into school is,<BR>\n" );
document.write( "P(A given B) = 9/14 * A = 3/7 = 9A/14 = 3/7, then<BR>\n" );
document.write( "cross multiply fractions<BR>\n" );
document.write( "63A = 42<BR>\n" );
document.write( "A = 42 / 63 = 6 / 9 = 2/3 and<BR>\n" );
document.write( "2/3 * 9/14 = 18 / 42 = 3/7<BR>\n" );
document.write( "answer checks<BR>\n" );
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