document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=178526>Question 178526</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need help with this question please. I started it but I am not sure that I am doing it right...<BR>\n" );
document.write( "5.70	* The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events. Why might the assumption of independence be violated? (b) Why might a driver be tempted not to use a seat belt “just on this trip”?<BR>\n" );
document.write( "P(A)=1/4000000=0.00000025\r<BR>\n" );
document.write( "\n" );
document.write( "\"P(B)=\"  50000/4000000=0.0125<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #133489 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=133489\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events. Why might the assumption of independence be violated? (b) Why might a driver be tempted not to use a seat belt “just on this trip”?<BR>\n" );
document.write( "P(A)=1/4000000=0.00000025 <BR>\n" );
document.write( "\"P(B)=\" 50000/4000000=0.0125<BR>\n" );
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document.write( "P(A) is correct<BR>\n" );
document.write( "P(B) = [1/4 million)]^50,000 because the events are assumed to be independent.<BR>\n" );
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document.write( "Assumption may be violated because prob of a accident for an indivisual<BR>\n" );
document.write( "changes from adolescence to adult to old age.<BR>\n" );
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document.write( "He might say the prob on this trip is so small that caution in not necessary.<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Read the book \"The Black Swan\" by N.N. Taleb to get a new prospective on <BR>\n" );
document.write( "improbable events.<BR>\n" );
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document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );