document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=998977>Question 998977</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Im very confused by the questions in this problem. <BR>\n" );
document.write( "Heres the table i am being given \r<BR>\n" );
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document.write( "Refer to the table below. Given that 2 of the 300 subjects are randomly selected   <BR>\n" );
document.write( "                GROUP<BR>\n" );
document.write( "     ---------------------<BR>\n" );
document.write( " (type)O     A     B   AB<BR>\n" );
document.write( " Rh+       95    97   38   17<BR>\n" );
document.write( "     Rh-   25    16   8    4   <BR>\n" );
document.write( "  <BR>\n" );
document.write( "i hope this table can be read correctly\r<BR>\n" );
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document.write( "a. Assume that the selections are made with replacement. What is the probability that 2 selected subjects are both group A and type Rh+?\r<BR>\n" );
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document.write( "b. Now assume the selections are made without replacement. This means the probability of selecting the second subject who is group A and Rh+ is not the same as the probability of selecting the first subject? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #616639 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=616639\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> With replacement, multiply the probabilities.<BR>\n" );
document.write( "type)O A B AB<BR>\n" );
document.write( "Rh+ 95 97 38 17 =247<BR>\n" );
document.write( "Rh- 25 16 8 4 ;;;;=53<BR>\n" );
document.write( " ;;;;120/113/46/21=300<BR>\n" );
document.write( "A+ is 97/300<BR>\n" );
document.write( "With replacement the probability of 2 is (97/300)^2=0.1045<BR>\n" );
document.write( "Without replacement, the probability is (97/300)*(96/299)=0.1038<BR>\n" );
document.write( "The numerator and the denominator both decrease 1, and because of the relatively large sample, the change in probability is not much.  It is lower, and it should be with one less A+ to choose from. </SPAN>\n" );
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