document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1163363>Question 1163363</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the missing probability.<BR>\n" );
document.write( "P(A)=9/20,P(B)=3/5,P(A∩B)=27/100 ,P(A∪B)=? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #787438 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=787438\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p(a union b) = p(a) + p(b) - p(a intersect b)<BR>\n" );
document.write( "therefore:<BR>\n" );
document.write( "p(a union b) = 9/20 + 3/5 - 27/100<BR>\n" );
document.write( "multiply both sides of this equation by 100 to get:<BR>\n" );
document.write( "100 * p(a union b) = 45 + 60 - 27 = 78<BR>\n" );
document.write( "divide both sides by 100 to get:<BR>\n" );
document.write( "p(a union b) = 78/100 = 39/50<BR>\n" );
document.write( "that's your solution.\r<BR>\n" );
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