document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=798841>Question 798841</A>: <I><SPAN STYLE=\"word-break: break-all;\"> It is found that, in general 2 out of 5 persons are swimmer.<BR>\n" );
document.write( "If 4 persons are selected at random, what is the probability that -<BR>\n" );
document.write( "(i) two of them are swimmers and<BR>\n" );
document.write( "(ii) at least on of them is a swimmer? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #482381 by </B><A HREF=/tutors/aboutme.mpl?userid=Finavon><B>Finavon(81)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Finavon><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=482381\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Each selected from general population has p(swim) 0.4; p(non) 0.6<BR>\n" );
document.write( "a) <BR>\n" );
document.write( "SSNNN<BR>\n" );
document.write( "SNSNN<BR>\n" );
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document.write( "SNNNS<BR>\n" );
document.write( "NSSNN<BR>\n" );
document.write( "NSNSN<BR>\n" );
document.write( "NSNNS<BR>\n" );
document.write( "NNSSN<BR>\n" );
document.write( "NNSNS<BR>\n" );
document.write( "NNNSS<BR>\n" );
document.write( "P Each 0.6^3*0.4^2=0.03456<BR>\n" );
document.write( "10 ways so x10<BR>\n" );
document.write( "p(2swim)=0.3456\r<BR>\n" );
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document.write( "b) need Prob not all non-swimmers<BR>\n" );
document.write( "= (1-(0.6*0.6*0.6*0.6)) = 0.87 </SPAN>\n" );
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