document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=870422>Question 870422</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 17)	Among the 25 invoices prepared by a billing department, 5 contain errors while the others do not. If we randomly check 3 of these invoices, what are the probabilities that<BR>\n" );
document.write( "a.	All three will contain errors<BR>\n" );
document.write( "b.	Neither will contain errors<BR>\n" );
document.write( "c.	At least one will contain errors<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #524841 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=524841\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> p(errors) = 5/25 = 1/5 = .2,   n = 3 (check 3)<BR>\n" );
document.write( "a) P(all contain errors) = (.2)^3<BR>\n" );
document.write( "b) P(none contain errors) = (.8)^3<BR>\n" );
document.write( "c) P(at least one) = 1- P(none) = 1-(.8)^3 </SPAN>\n" );
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