SOLUTION: a researcher catches 60 fish from different locations in a lake. he then tags the fish and puts them back in the lake. 2 weeks later the researcher catches 40 fish from the same lo

Question 736354: a researcher catches 60 fish from different locations in a lake. he then tags the fish and puts them back in the lake. 2 weeks later the researcher catches 40 fish from the same locations. 8 of these 40 fish are tagged. predict the number of fish in the lake.
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Being very informal, you may have a proportion. 8 fish tagged to 40 fish caught is similar to 60 fish tagged to p fish in the lake.

We assume that the 60 tagged fish distributed themselves equally throughout the lake. When this is achieved, the ratio of tagged fish to the whole population of fish in the lake is 60:p, using p as the count (unknown) of fish in the lake.

, and we would just solve for p.
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