Question 1080549
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A thousand fish in one of the lakes in Ontario were caught{{{highlight(cross(and))}}} tagged {{{highlight(and_returned_back_to_the lake)}}} by the Department of Oceans and Fisheries.  
After a few days, 600 fish caught and of those, 80 had tags.  What conclusion could be made about the total number of fish in the lake?
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See the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/proportions/lessons/Using-proportions-to-estimate-the-number-of-fish-in-a-lake.lesson>Using proportions to estimate the number of fish in a lake</A>

in this site.



This method is used to estimate the amount of fish in lakes.


The proportion works 


{{{1000/x}}} = {{{80/600}}},


which gives the estimate for the number of fish in the lake


x = {{{(1000*600)/80}}} = 7500.