document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=342849>Question 342849</A>: <I><SPAN STYLE=\"word-break: break-all;\"> You must go through three tunnels to complete the journey. The probability of their being blocked is 15% for the first, 20% for the second and 15% for the third. What is the probability of completeing the journey?\r<BR>\n" );
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document.write( "I did: 15%=.15<BR>\n" );
document.write( "       20%= .20<BR>\n" );
document.write( "       15%= .15\r<BR>\n" );
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document.write( "       .15+.20+.15=.50 so the answer would be 50%??? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #245360 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=245360\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You must go through three tunnels to complete the journey. The probability of their being blocked is 15% for the first, 20% for the second and 15% for the third. What is the probability of completing the journey? <BR>\n" );
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document.write( "P(1st is open) = 0.85<BR>\n" );
document.write( "P(2nd is open) = 0.80<BR>\n" );
document.write( "P(3rd is open) = 0.85<BR>\n" );
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document.write( "To complete the journey, all must be open.<BR>\n" );
document.write( "P(all open) = 0.85*0.80*0.85 = 0.5780<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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