document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=477561>Question 477561</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a multiple-choice test, each question has five options. Students will get 4 points for each correct answer; lose 2 points for each incorrect answer; and receive no points for unanswered questions. A student does not know the correct answer for one question. Is it to her advantage or disadvantage to guess an answer? Show your calculations for expected value. Show your work for full credit. \r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #327317 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=327317\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The expected value is <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE 4(\frac{1}{5}) - 2(\frac{1}{5})- 2(\frac{1}{5})- 2(\frac{1}{5})- 2(\frac{1}{5})\">, which is negative. Hence, in the long run, it is a disadvantage to guess. </SPAN>\n" );
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