As part of a conservation effort for a lake, 70 fish were caught, tagged, and then released. Later, 80 fish were caught from the lake. Four of these 80 fish were found to have tags. Estimate the number of fish in the lake.

Answer 1

4/80 = 5% of the caught fish were tagged.

So, the 70 tagged fish must be about 5% of the total population.

Answer 2

1400 Fish