SOLUTION: Researchers tagged 420 fish in a local lake. A few weeks later they sampled 500 fish from the lake and 9 that were tagged. Estimate the fish population in the lake.

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Question 368963: Researchers tagged 420 fish in a local lake. A few weeks later they sampled 500 fish from the lake and 9 that were tagged. Estimate the fish population in the lake.
Answer by Edwin McCravy(20064) About Me  (Show Source):
You can put this solution on YOUR website!

number tagged in whole lake      number tagged in later catch
----------------------------  = ------------------------------
    number in lake                  number in later catch

                        420         9 
                       -----  =  -------   
                         N         500

Solve that and get 23333.33333 or about 23333

Edwin