Question

Scientist randomly caught 10 fruit bats at an orchard and marked them with tags and then released them. Later on, they caught 30 fruit bats at the same location and 6 of them had tags. Assuming the population stays the same, how many fruit bats live there?

Answer 1

Ignoring sample variance, the mean should stay the same. So let P be the population
10/P=6/30 Same mean
so P=300/6=about 50