document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=402112>Question 402112</A>: <I><SPAN STYLE=\"word-break: break-all;\"> ST Paul Island in Alaska has 12 fur seal rookeries ( breeding place) .in 1961,to estimate the fur seal pup population in the Gorbath rookery,4963 fur seal pups were tagged in early August.In late August, a sample of 900 pups was observed and 218 of these  were found to have been previously tagged. Estimate the total number of fur seal pups in this rookery. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #284511 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=284511\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ST Paul Island in Alaska has 12 fur seal rookeries ( breeding place) .<BR>\n" );
document.write( "in 1961, to estimate the fur seal pup population in the Gorbath rookery, 4963 fur<BR>\n" );
document.write( " seal pups were tagged in early August.<BR>\n" );
document.write( "In late August, a sample of 900 pups was observed and 218 of these were found to have been previously tagged. <BR>\n" );
document.write( "Estimate the total number of fur seal pups in this rookery.<BR>\n" );
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document.write( "A ratio equation:<BR>\n" );
document.write( "Let e = estimated number<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=e%2F900 ALIGN=MIDDLE  ALT=\"e%2F900\"   DISABLED_style= \"max-width:90%; height:auto;\" > = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4963%2F218 ALIGN=MIDDLE  ALT=\"4963%2F218\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Cross multiply<BR>\n" );
document.write( "218e = 900 * 4963<BR>\n" );
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document.write( "218e = 4466700<BR>\n" );
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document.write( "e = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=4466700%2F218 ALIGN=MIDDLE  ALT=\"4466700%2F218\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "e = 20,489  </SPAN>\n" );
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