document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=255295>Question 255295</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the problability of getting all four problems right on a test with 4 differnet possible answers? what is the problability of getting at least one problem rgiht? <BR>\n" );
document.write( "for my formula i got n=4 x=4 p=1 and q=0 for the first question and then n=4 x=1 p=1 and q= 3 for the second question\r<BR>\n" );
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document.write( "and the formula is n!/(n-x)!x!* p^x*q^n-x </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #187593 by </B><A HREF=/tutors/aboutme.mpl?userid=edjones><B>edjones(8007)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=edjones><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=edjones><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=187593\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> what is the problability of getting all four problems right on a test with 4 differnet possible answers? what is the problability of getting at least one problem rgiht? <BR>\n" );
document.write( "...IF YOU GUESS! You left this part out. Be sure to put it in next time.<BR>\n" );
document.write( "Expansion of (c+w)^4 gives all the probabilities.<BR>\n" );
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document.write( "a)<BR>\n" );
document.write( "Let c=probability of guessing correctly =.25 <BR>\n" );
document.write( "w= prob. of guessing wrongly=.75<BR>\n" );
document.write( "c^4=.25^4=.0039<BR>\n" );
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document.write( "b)<BR>\n" );
document.write( "1-w^4 One minus prob. that all are wrong.<BR>\n" );
document.write( "=1-.75^4<BR>\n" );
document.write( "=1-.3164<BR>\n" );
document.write( "=.6836<BR>\n" );
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document.write( "Ed </SPAN>\n" );
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