document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1088258>Question 1088258</A>: <I><SPAN STYLE=\"word-break: break-all;\"> hello, i needed help to get this answer, im lost trying to get the correct answer?\r<BR>\n" );
document.write( "\n" );
document.write( ". The National Safety Council publishes information about automobiles accidents in Accidents<BR>\n" );
document.write( "Facts. According to that document, the probability is 3/5 that a traffic fatality involves as<BR>\n" );
document.write( "intoxication or alcohol-impaired driver or non-occupant. In eight traffic fatalities, find the<BR>\n" );
document.write( "probability that the number, Y, which involve an intoxicated or alcohol-impaired driver or nonoccupant<BR>\n" );
document.write( "is<BR>\n" );
document.write( "a. Exactly five;<BR>\n" );
document.write( "b. at least five;<BR>\n" );
document.write( "c. at most five<BR>\n" );
document.write( "d. Between two and four, inclusive<BR>\n" );
document.write( "e. Find the mean<BR>\n" );
document.write( "f. Find the standard deviation of Y </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #702584 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=702584\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> This is a binomial probability problem involving 8 trials, in which the probability of a \"success\" is 3/5.<BR>\n" );
document.write( "In general, the probability of x successes out of n tries is:<BR>\n" );
document.write( "P(x)=n!/(x!(n&#8722;x)!)p^x(1&#8722;p)^(n&#8722;x)<BR>\n" );
document.write( "The mean of a binomial distribution is just n*p and the standard deviation is sqrt(n*p(1-p)<BR>\n" );
document.write( "a. P(5) = 8!/(5!*3!)*0.6^5*0.4^3 = 0.2787<BR>\n" );
document.write( "I will leave it as an exercise to compute the other values...<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );