An ecologist catches 100 frogs from a pond,marks them,and releases them back into the pond.After a few days,another 100 frogs are captured and 10 have the marks on them.How many frogs are in the pond?

Question

Quizplus · Accepted Answer

Assuming that none of the marked frogs were caught again, there are now a total of 200 frogs in the pond, 100 of which are marked. If 10 of the 100 caught were marked, that means they represent 10% of the population, so the total population must be 10 times the number of marked frogs (1000). Therefore, the answer is E) 1000.

An Ecologist Catches 100 Frogs from a Pond,marks Them,and Releases