document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=303902>Question 303902</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A.How many different ways are there to answer a true/false test that has four questions? \r<BR>\n" );
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document.write( "B. If you were to guess at the four answers for the true/false test, what is the probability of getting all four right?\r<BR>\n" );
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document.write( "C. If you were to guess at the four answers for the true/false test, what is the probability of getting at least two right? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #217866 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=217866\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A.How many different ways are there to answer a true/false test that has four questions? <BR>\n" );
document.write( "Ans: 2^4 = 16<BR>\n" );
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document.write( "B. If you were to guess at the four answers for the true/false test, what is the probability of getting all four right?<BR>\n" );
document.write( "Ans: (1/2)^4 = 1/16<BR>\n" );
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document.write( "C. If you were to guess at the four answers for the true/false test, what is the probability of getting at least two right?<BR>\n" );
document.write( "Binomial Problem with n=4 ; p = 1/2 <BR>\n" );
document.write( "P(2<= x <=4) = 1 - binomcdf(4,1/2,1) = 0.6875<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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