document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1114403>Question 1114403</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The probability that a certain event A occurs in a given run of an experiment is 0.3. The outcome of each run of this experiment is independent of the outcomes of other runs. If the experiment is run repeatedly until A occurs, what is the probability exactly four runs will be required? please answer help. God bless you </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #729340 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=729340\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The first three runs with probability 0.7 occur.  Their probability is 0.343 from independence.<BR>\n" );
document.write( "The fourth run has probability 0.3 of occurring, so the overall probability is 0.343 from the first three runs *0.3 for the fourth run.  This is 0.1029. </SPAN>\n" );
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