document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=341287>Question 341287</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A package of 15 apples contains two defective apples. Four apples are selected at random. (a) Find the probability that none of the selected apples are defective. (b) Find the probability that at least one of the selected apples is defective. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #244382 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=244382\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Combination of n things taken r at a time: nCr<BR>\n" );
document.write( "a) combinations of healthy apples/all combinations<BR>\n" );
document.write( "=13C4/15C4<BR>\n" );
document.write( "=715/1365<BR>\n" );
document.write( "=.5238<BR>\n" );
document.write( ".<BR>\n" );
document.write( "b) 1-.5238=.4762<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Ed </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );