document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=541911>Question 541911</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A student randomly guesses at 7 multiple choice questions. Each question has 5 possible choices. What is the probability that the student gets at most 1 correct answer? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #354336 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=354336\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A student randomly guesses at 7 multiple choice questions. Each question has 5 possible choices. What is the probability that the student gets at most 1 correct answer?<BR>\n" );
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document.write( "Binomial Problem with n = 7 and p(correct) = 1/5<BR>\n" );
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document.write( "P(x = 0 or 1) = 7C0(1/5)^0*(4/5)^7 + 7C1(1/5)*(4/5)*6<BR>\n" );
document.write( "= (4/5)^7 + 7*(1/5)*(4/5)^6<BR>\n" );
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document.write( "= 0.5767<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "================= </SPAN>\n" );
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