document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1115389>Question 1115389</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Let X be a random variable whose value is determined by the flip of a fair coin. If the coin lands heads up X=1, if tails then X=0. Find the expected value of X.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #730274 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=730274\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Probability of getting a head is 1/2 and the probability of getting a tail is 1/2<BR>\n" );
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document.write( "Expected value is the sum of the possible values of the discrete random variable(1 or 0 in this case) weighted by their associated probability<BR>\n" );
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document.write( "E(X) = (1/2) * 1 + (1/2) * 0 = 1/2 <BR>\n" );
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